15621104063 has 4 divisors (see below), whose sum is σ = 15632532720. Its totient is φ = 15609675408.

The previous prime is 15621104033. The next prime is 15621104101. The reversal of 15621104063 is 36040112651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15621104063 - 2⁶ = 15621103999 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 (15621104033) 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 3 ways as a sum of consecutive naturals, for example, 5712278 + ... + 5715011.

It is an arithmetic number, because the mean of its divisors is an integer number (3908133180).

Almost surely, 2^15621104063 is an apocalyptic number.

15621104063 is a deficient number, since it is larger than the sum of its proper divisors (11428657).

15621104063 is a wasteful number, since it uses less digits than its factorization.

15621104063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428656.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 15621104063 in words is "fifteen billion, six hundred twenty-one million, one hundred four thousand, sixty-three".