38516522421 has 16 divisors (see below), whose sum is σ = 55972115136. Its totient is φ = 23416901376.

The previous prime is 38516522417. The next prime is 38516522431. The reversal of 38516522421 is 12422561583.

It is not a de Polignac number, because 38516522421 - 2² = 38516522417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 38516522421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38516522431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5946180 + ... + 5952653.

It is an arithmetic number, because the mean of its divisors is an integer number (3498257196).

Almost surely, 2^38516522421 is an apocalyptic number.

It is an amenable number.

38516522421 is a deficient number, since it is larger than the sum of its proper divisors (17455592715).

38516522421 is a wasteful number, since it uses less digits than its factorization.

38516522421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11898932.

The product of its digits is 115200, while the sum is 39.

The spelling of 38516522421 in words is "thirty-eight billion, five hundred sixteen million, five hundred twenty-two thousand, four hundred twenty-one".