85621577736 has 64 divisors (see below), whose sum is σ = 214671473280. Its totient is φ = 28458293760.

The previous prime is 85621577731. The next prime is 85621577737. The reversal of 85621577736 is 63777512658.

It is not an unprimeable number, because it can be changed into a prime (85621577731) 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, 19364806 + ... + 19369226.

It is an arithmetic number, because the mean of its divisors is an integer number (3354241770).

Almost surely, 2^85621577736 is an apocalyptic number.

It is an amenable number.

85621577736 is an abundant number, since it is smaller than the sum of its proper divisors (129049895544).

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

85621577736 is a wasteful number, since it uses less digits than its factorization.

85621577736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6574 (or 6570 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 57.

The spelling of 85621577736 in words is "eighty-five billion, six hundred twenty-one million, five hundred seventy-seven thousand, seven hundred thirty-six".