81058179665390 has 8 divisors (see below), whose sum is σ = 145904723397720. Its totient is φ = 32423271866152.

The previous prime is 81058179665371. The next prime is 81058179665431. The reversal of 81058179665390 is 9356697185018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81058179665390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4052908983260 + ... + 4052908983279.

It is an arithmetic number, because the mean of its divisors is an integer number (18238090424715).

Almost surely, 2^{81058179665390} is an apocalyptic number.

81058179665390 is a deficient number, since it is larger than the sum of its proper divisors (64846543732330).

81058179665390 is a wasteful number, since it uses less digits than its factorization.

81058179665390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105817966546.

The product of its (nonzero) digits is 97977600, while the sum is 68.

The spelling of 81058179665390 in words is "eighty-one trillion, fifty-eight billion, one hundred seventy-nine million, six hundred sixty-five thousand, three hundred ninety".