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42878516315823 = 3217655726984371
BaseRepresentation
bin10011011111111011011101…
…01110111100011010101111
312121211010221112012201012100
421233331232232330122233
521110010200134101243
6231110041330510143
712013604415033426
oct1157755656743257
9177733845181170
1042878516315823
111273174968a861
124986188435353
131ac0571711576
14a8348cdb22bd
154e557e0d50d3
hex26ff6ebbc6af

42878516315823 has 12 divisors (see below), whose sum is σ = 61935987770488. Its totient is φ = 28585514578320.

The previous prime is 42878516315783. The next prime is 42878516315827. The reversal of 42878516315823 is 32851361587824.

42878516315823 is a `hidden beast` number, since 4 + 2 + 8 + 7 + 8 + 5 + 16 + 31 + 582 + 3 = 666.

It is not a de Polignac number, because 42878516315823 - 212 = 42878516311727 is a prime.

It is a super-2 number, since 2×428785163158232 (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878516315827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11903173 + ... + 15081198.

Almost surely, 242878516315823 is an apocalyptic number.

42878516315823 is a deficient number, since it is larger than the sum of its proper divisors (19057471454665).

42878516315823 is a wasteful number, since it uses less digits than its factorization.

42878516315823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27160934 (or 27160931 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 42878516315823 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred sixteen million, three hundred fifteen thousand, eight hundred twenty-three".

Divisors: 1 3 9 176557 529671 1589013 26984371 80953113 242859339 4764279590647 14292838771941 42878516315823