72979943507458 has 8 divisors (see below), whose sum is σ = 117890677973628. Its totient is φ = 33683050849584.

The previous prime is 72979943507363. The next prime is 72979943507467. The reversal of 72979943507458 is 85470534997927.

It can be written as a sum of positive squares in 2 ways, for example, as 65038047356689 + 7941896150769 = 8064617^2 + 2818137^2 .

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

It is a super-2 number, since 2×72979943507458² (a number of 29 digits) contains 22 as substring.

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, 1403460452041 + ... + 1403460452092.

Almost surely, 2^{72979943507458} is an apocalyptic number.

72979943507458 is a deficient number, since it is larger than the sum of its proper divisors (44910734466170).

72979943507458 is a wasteful number, since it uses less digits than its factorization.

72979943507458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806920904148.

The product of its (nonzero) digits is 4800902400, while the sum is 79.

The spelling of 72979943507458 in words is "seventy-two trillion, nine hundred seventy-nine billion, nine hundred forty-three million, five hundred seven thousand, four hundred fifty-eight".