85120400687 has 16 divisors (see below), whose sum is σ = 100489469952. Its totient is φ = 70556909760.

The previous prime is 85120400639. The next prime is 85120400707. The reversal of 85120400687 is 78600402158.

It is a cyclic number.

It is not a de Polignac number, because 85120400687 - 2¹² = 85120396591 is a prime.

It is a super-2 number, since 2×85120400687² (a number of 23 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 (85120400587) 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, 170963 + ... + 446619.

It is an arithmetic number, because the mean of its divisors is an integer number (6280591872).

Almost surely, 2^85120400687 is an apocalyptic number.

85120400687 is a deficient number, since it is larger than the sum of its proper divisors (15369069265).

85120400687 is a wasteful number, since it uses less digits than its factorization.

85120400687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277118.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 85120400687 in words is "eighty-five billion, one hundred twenty million, four hundred thousand, six hundred eighty-seven".