83915652921 has 4 divisors (see below), whose sum is σ = 111887537232. Its totient is φ = 55943768612.

The previous prime is 83915652911. The next prime is 83915652937. The reversal of 83915652921 is 12925651938.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 83915652921 - 2¹⁴ = 83915636537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83915652911) 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, 13985942151 + ... + 13985942156.

It is an arithmetic number, because the mean of its divisors is an integer number (27971884308).

Almost surely, 2^83915652921 is an apocalyptic number.

It is an amenable number.

83915652921 is a deficient number, since it is larger than the sum of its proper divisors (27971884311).

83915652921 is a wasteful number, since it uses less digits than its factorization.

83915652921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27971884310.

The product of its digits is 1166400, while the sum is 51.

The spelling of 83915652921 in words is "eighty-three billion, nine hundred fifteen million, six hundred fifty-two thousand, nine hundred twenty-one".