79775721450 has 72 divisors (see below), whose sum is σ = 222268982208. Its totient is φ = 21273522480.

The previous prime is 79775721407. The next prime is 79775721479. The reversal of 79775721450 is 5412757797.

79775721450 is a `hidden beast` number, since 7 + 9 + 7 + 7 + 572 + 14 + 50 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3270802 + ... + 3295101.

Almost surely, 2^79775721450 is an apocalyptic number.

79775721450 is an abundant number, since it is smaller than the sum of its proper divisors (142493260758).

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

79775721450 is a wasteful number, since it uses less digits than its factorization.

79775721450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6565930 (or 6565913 counting only the distinct ones).

The product of its (nonzero) digits is 4321800, while the sum is 54.

The spelling of 79775721450 in words is "seventy-nine billion, seven hundred seventy-five million, seven hundred twenty-one thousand, four hundred fifty".