81002755074 has 32 divisors (see below), whose sum is σ = 162640082880. Its totient is φ = 26895355200.

The previous prime is 81002755051. The next prime is 81002755111. The reversal of 81002755074 is 47055720018.

It is a super-2 number, since 2×81002755074² (a number of 23 digits) contains 22 as substring.

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, 1640304 + ... + 1688964.

It is an arithmetic number, because the mean of its divisors is an integer number (5082502590).

Almost surely, 2^81002755074 is an apocalyptic number.

81002755074 is an abundant number, since it is smaller than the sum of its proper divisors (81637327806).

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

81002755074 is a wasteful number, since it uses less digits than its factorization.

81002755074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49746.

The product of its (nonzero) digits is 78400, while the sum is 39.

The spelling of 81002755074 in words is "eighty-one billion, two million, seven hundred fifty-five thousand, seventy-four".