55721290434 has 32 divisors (see below), whose sum is σ = 112198293504. Its totient is φ = 18448216320.

The previous prime is 55721290433. The next prime is 55721290441. The reversal of 55721290434 is 43409212755.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55721290433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503512 + ... + 604124.

It is an arithmetic number, because the mean of its divisors is an integer number (3506196672).

Almost surely, 2^55721290434 is an apocalyptic number.

55721290434 is an abundant number, since it is smaller than the sum of its proper divisors (56477003070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55721290434 is a wasteful number, since it uses less digits than its factorization.

55721290434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101242.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 55721290434 in words is "fifty-five billion, seven hundred twenty-one million, two hundred ninety thousand, four hundred thirty-four".