85261400880 has 80 divisors (see below), whose sum is σ = 264703578720. Its totient is φ = 22702546944.

The previous prime is 85261400837. The next prime is 85261400893. The reversal of 85261400880 is 8800416258.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102415 + ... + 425454.

It is an arithmetic number, because the mean of its divisors is an integer number (3308794734).

Almost surely, 2^85261400880 is an apocalyptic number.

85261400880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85261400880 is an abundant number, since it is smaller than the sum of its proper divisors (179442177840).

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

85261400880 is a wasteful number, since it uses less digits than its factorization.

85261400880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528558 (or 528552 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 85261400880 in words is "eighty-five billion, two hundred sixty-one million, four hundred thousand, eight hundred eighty".