81177650132634 has 48 divisors (see below), whose sum is σ = 198980906735520. Its totient is φ = 24599287917360.

The previous prime is 81177650132627. The next prime is 81177650132641. The reversal of 81177650132634 is 43623105677118.

81177650132634 is a `hidden beast` number, since 8 + 1 + 1 + 7 + 76 + 501 + 3 + 2 + 63 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (81177650132627) and next prime (81177650132641).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7592367469 + ... + 7592378160.

It is an arithmetic number, because the mean of its divisors is an integer number (4145435556990).

Almost surely, 2^{81177650132634} is an apocalyptic number.

81177650132634 is an abundant number, since it is smaller than the sum of its proper divisors (117803256602886).

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

81177650132634 is a wasteful number, since it uses less digits than its factorization.

81177650132634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15184745657 (or 15184745645 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 81177650132634 in words is "eighty-one trillion, one hundred seventy-seven billion, six hundred fifty million, one hundred thirty-two thousand, six hundred thirty-four".