15421042414555 has 4 divisors (see below), whose sum is σ = 18505250897472. Its totient is φ = 12336833931640.

The previous prime is 15421042414507. The next prime is 15421042414559. The reversal of 15421042414555 is 55541424012451.

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

It is not a de Polignac number, because 15421042414555 - 2²⁵ = 15421008860123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15421042414559) 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, 1542104241451 + ... + 1542104241460.

It is an arithmetic number, because the mean of its divisors is an integer number (4626312724368).

Almost surely, 2^{15421042414555} is an apocalyptic number.

15421042414555 is a deficient number, since it is larger than the sum of its proper divisors (3084208482917).

15421042414555 is an equidigital number, since it uses as much as digits as its factorization.

15421042414555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084208482916.

The product of its (nonzero) digits is 640000, while the sum is 43.

The spelling of 15421042414555 in words is "fifteen trillion, four hundred twenty-one billion, forty-two million, four hundred fourteen thousand, five hundred fifty-five".