85621457646 has 16 divisors (see below), whose sum is σ = 190269906000. Its totient is φ = 28540485864.

The previous prime is 85621457617. The next prime is 85621457659. The reversal of 85621457646 is 64675412658.

85621457646 is a `hidden beast` number, since 8 + 5 + 6 + 21 + 4 + 576 + 46 = 666.

It is a super-2 number, since 2×85621457646² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1585582549 = 85621457646 / (8 + 5 + 6 + 2 + 1 + 4 + 5 + 7 + 6 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 85621457592 and 85621457601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792791221 + ... + 792791328.

It is an arithmetic number, because the mean of its divisors is an integer number (11891869125).

Almost surely, 2^85621457646 is an apocalyptic number.

85621457646 is an abundant number, since it is smaller than the sum of its proper divisors (104648448354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85621457646 is a wasteful number, since it uses less digits than its factorization.

85621457646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585582560 (or 1585582554 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 85621457646 in words is "eighty-five billion, six hundred twenty-one million, four hundred fifty-seven thousand, six hundred forty-six".