879648719621 has 4 divisors (see below), whose sum is σ = 1005312822432. Its totient is φ = 753984616812.

The previous prime is 879648719611. The next prime is 879648719623. The reversal of 879648719621 is 126917846978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 879648719621 - 2³⁸ = 604770812677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879648719623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62832051395 + ... + 62832051408.

It is an arithmetic number, because the mean of its divisors is an integer number (251328205608).

Almost surely, 2^879648719621 is an apocalyptic number.

It is an amenable number.

879648719621 is a deficient number, since it is larger than the sum of its proper divisors (125664102811).

879648719621 is a wasteful number, since it uses less digits than its factorization.

879648719621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125664102810.

The product of its digits is 73156608, while the sum is 68.

The spelling of 879648719621 in words is "eight hundred seventy-nine billion, six hundred forty-eight million, seven hundred nineteen thousand, six hundred twenty-one".