81014272878 has 32 divisors (see below), whose sum is σ = 202009616640. Its totient is φ = 21042668160.

The previous prime is 81014272861. The next prime is 81014272903. The reversal of 81014272878 is 87827241018.

It is a congruent number.

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, 87677323 + ... + 87678246.

It is an arithmetic number, because the mean of its divisors is an integer number (6312800520).

Almost surely, 2^81014272878 is an apocalyptic number.

81014272878 is an abundant number, since it is smaller than the sum of its proper divisors (120995343762).

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

81014272878 is a wasteful number, since it uses less digits than its factorization.

81014272878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175355592.

The product of its (nonzero) digits is 401408, while the sum is 48.

The spelling of 81014272878 in words is "eighty-one billion, fourteen million, two hundred seventy-two thousand, eight hundred seventy-eight".