87605999257 has 16 divisors (see below), whose sum is σ = 102273933312. Its totient is φ = 73476968400.

The previous prime is 87605999219. The next prime is 87605999267. The reversal of 87605999257 is 75299950678.

It is a cyclic number.

It is not a de Polignac number, because 87605999257 - 2¹¹ = 87605997209 is a prime.

It is a super-2 number, since 2×87605999257² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87605999192 and 87605999201.

It is not an unprimeable number, because it can be changed into a prime (87605999267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1601988 + ... + 1655770.

It is an arithmetic number, because the mean of its divisors is an integer number (6392120832).

Almost surely, 2^87605999257 is an apocalyptic number.

It is an amenable number.

87605999257 is a deficient number, since it is larger than the sum of its proper divisors (14667934055).

87605999257 is a wasteful number, since it uses less digits than its factorization.

87605999257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58788.

The product of its (nonzero) digits is 85730400, while the sum is 67.

The spelling of 87605999257 in words is "eighty-seven billion, six hundred five million, nine hundred ninety-nine thousand, two hundred fifty-seven".