81374768334 has 24 divisors (see below), whose sum is σ = 176318395032. Its totient is φ = 27123938640.

The previous prime is 81374768273. The next prime is 81374768353. The reversal of 81374768334 is 43386747318.

81374768334 is a `hidden beast` number, since 8 + 137 + 476 + 8 + 3 + 34 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566469 + ... + 695439.

It is an arithmetic number, because the mean of its divisors is an integer number (7346599793).

Almost surely, 2^81374768334 is an apocalyptic number.

81374768334 is an abundant number, since it is smaller than the sum of its proper divisors (94943626698).

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

81374768334 is a wasteful number, since it uses less digits than its factorization.

81374768334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164032 (or 164029 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 81374768334 in words is "eighty-one billion, three hundred seventy-four million, seven hundred sixty-eight thousand, three hundred thirty-four".