85856616651 has 16 divisors (see below), whose sum is σ = 123502657824. Its totient is φ = 52739971584.

The previous prime is 85856616583. The next prime is 85856616707. The reversal of 85856616651 is 15661665858.

It is not a de Polignac number, because 85856616651 - 2⁷ = 85856616523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85856616591 and 85856616600.

It is not an unprimeable number, because it can be changed into a prime (85856616551) 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 15 ways as a sum of consecutive naturals, for example, 1954446 + ... + 1997891.

It is an arithmetic number, because the mean of its divisors is an integer number (7718916114).

Almost surely, 2^85856616651 is an apocalyptic number.

85856616651 is a deficient number, since it is larger than the sum of its proper divisors (37646041173).

85856616651 is a wasteful number, since it uses less digits than its factorization.

85856616651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952910.

The product of its digits is 10368000, while the sum is 57.

The spelling of 85856616651 in words is "eighty-five billion, eight hundred fifty-six million, six hundred sixteen thousand, six hundred fifty-one".