79451260641 has 15 divisors (see below), whose sum is σ = 118690240801. Its totient is φ = 52965815868.

The previous prime is 79451260631. The next prime is 79451260657. The reversal of 79451260641 is 14606215497.

The square root of 79451260641 is 281871.

It is a perfect power (a square), and thus also a powerful number.

79451260641 is a `hidden beast` number, since 7 + 94 + 512 + 6 + 0 + 6 + 41 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-79451260641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79451260631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2521180 + ... + 2552498.

Almost surely, 2^79451260641 is an apocalyptic number.

79451260641 is the 281871-st square number.

79451260641 is the 140936-th centered octagonal number.

It is an amenable number.

79451260641 is a deficient number, since it is larger than the sum of its proper divisors (39238980160).

79451260641 is an frugal number, since it uses more digits than its factorization.

79451260641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62650 (or 31322 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 79451260641 in words is "seventy-nine billion, four hundred fifty-one million, two hundred sixty thousand, six hundred forty-one".