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68565829525 = 524363782167
BaseRepresentation
bin111111110110110101…
…111000011110010101
320112222110201000211121
4333312311320132111
52110410323021100
651255415403541
74645060635424
oct776665703625
9215873630747
1068565829525
1127095694616
12113566835b1
13660929387b
14346636b2bb
151bb476b51a
hexff6d78795

68565829525 has 12 divisors (see below), whose sum is σ = 86998877152. Its totient is φ = 53577019440.

The previous prime is 68565829487. The next prime is 68565829537. The reversal of 68565829525 is 52592856586.

It is not a de Polignac number, because 68565829525 - 221 = 68563732373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31890009 + ... + 31892158.

Almost surely, 268565829525 is an apocalyptic number.

It is an amenable number.

68565829525 is a deficient number, since it is larger than the sum of its proper divisors (18433047627).

68565829525 is a wasteful number, since it uses less digits than its factorization.

68565829525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63782220 (or 63782215 counting only the distinct ones).

The product of its digits is 51840000, while the sum is 61.

The spelling of 68565829525 in words is "sixty-eight billion, five hundred sixty-five million, eight hundred twenty-nine thousand, five hundred twenty-five".

Divisors: 1 5 25 43 215 1075 63782167 318910835 1594554175 2742633181 13713165905 68565829525