81250390432368 has 60 divisors (see below), whose sum is σ = 234723350150848. Its totient is φ = 26209803363840.

The previous prime is 81250390432319. The next prime is 81250390432373. The reversal of 81250390432368 is 86323409305218.

81250390432368 is a `hidden beast` number, since 8 + 1 + 2 + 503 + 90 + 43 + 2 + 3 + 6 + 8 = 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, 9100621705 + ... + 9100630632.

Almost surely, 2^{81250390432368} is an apocalyptic number.

It is an amenable number.

81250390432368 is an abundant number, since it is smaller than the sum of its proper divisors (153472959718480).

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

81250390432368 is a wasteful number, since it uses less digits than its factorization.

81250390432368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18201252382 (or 18201252373 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 81250390432368 in words is "eighty-one trillion, two hundred fifty billion, three hundred ninety million, four hundred thirty-two thousand, three hundred sixty-eight".