15421000555 has 32 divisors (see below), whose sum is σ = 19426314240. Its totient is φ = 11729477760.

The previous prime is 15421000549. The next prime is 15421000579. The reversal of 15421000555 is 55500012451.

It is not a de Polignac number, because 15421000555 - 2⁵ = 15421000523 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21447486 + ... + 21448204.

It is an arithmetic number, because the mean of its divisors is an integer number (607072320).

Almost surely, 2^15421000555 is an apocalyptic number.

15421000555 is a deficient number, since it is larger than the sum of its proper divisors (4005313685).

15421000555 is a wasteful number, since it uses less digits than its factorization.

15421000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 15421000555 in words is "fifteen billion, four hundred twenty-one million, five hundred fifty-five", and thus it is an aban number.