81268127940974 has 32 divisors (see below), whose sum is σ = 133195625488800. Its totient is φ = 36963117113472.

The previous prime is 81268127940959. The next prime is 81268127941061. The reversal of 81268127940974 is 47904972186218.

81268127940974 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 46572749 + ... + 48286200.

It is an arithmetic number, because the mean of its divisors is an integer number (4162363296525).

Almost surely, 2^{81268127940974} is an apocalyptic number.

81268127940974 is a deficient number, since it is larger than the sum of its proper divisors (51927497547826).

81268127940974 is a wasteful number, since it uses less digits than its factorization.

81268127940974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94859444.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 81268127940974 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred twenty-seven million, nine hundred forty thousand, nine hundred seventy-four".