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80615500487 = 531720788397
BaseRepresentation
bin100101100010100001…
…1101110101011000111
321201002020021201221022
41023011003232223013
52310100032003422
6101011221541355
75552504306444
oct1130503565307
9251066251838
1080615500487
1131209391775
1213759b7485b
1377a97c9aa2
143c8a7d89cb
15216c54e342
hex12c50eeac7

80615500487 has 8 divisors (see below), whose sum is σ = 82142250336. Its totient is φ = 79088961952.

The previous prime is 80615500481. The next prime is 80615500519. The reversal of 80615500487 is 78400551608.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80615500487 - 210 = 80615499463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80615500481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867773 + ... + 956169.

It is an arithmetic number, because the mean of its divisors is an integer number (10267781292).

Almost surely, 280615500487 is an apocalyptic number.

80615500487 is a deficient number, since it is larger than the sum of its proper divisors (1526749849).

80615500487 is a wasteful number, since it uses less digits than its factorization.

80615500487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105657.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 80615500487 in words is "eighty billion, six hundred fifteen million, five hundred thousand, four hundred eighty-seven".

Divisors: 1 53 17207 88397 911971 4685041 1521047179 80615500487