79047421761 has 96 divisors (see below), whose sum is σ = 145332817920. Its totient is φ = 37646985600.

The previous prime is 79047421667. The next prime is 79047421771. The reversal of 79047421761 is 16712474097.

It is a happy number.

It is not a de Polignac number, because 79047421761 - 2⁹ = 79047421249 is a prime.

It is a super-2 number, since 2×79047421761² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79047421761.

It is not an unprimeable number, because it can be changed into a prime (79047421771) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 910915 + ... + 993911.

It is an arithmetic number, because the mean of its divisors is an integer number (1513883520).

Almost surely, 2^79047421761 is an apocalyptic number.

It is an amenable number.

79047421761 is a deficient number, since it is larger than the sum of its proper divisors (66285396159).

79047421761 is a wasteful number, since it uses less digits than its factorization.

79047421761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83075 (or 83068 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 79047421761 in words is "seventy-nine billion, forty-seven million, four hundred twenty-one thousand, seven hundred sixty-one".