55721121562 has 16 divisors (see below), whose sum is σ = 84600304992. Its totient is φ = 27521112240.

The previous prime is 55721121503. The next prime is 55721121593. The reversal of 55721121562 is 26512112755.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486612 + ... + 1523632.

It is an arithmetic number, because the mean of its divisors is an integer number (5287519062).

Almost surely, 2^55721121562 is an apocalyptic number.

55721121562 is a deficient number, since it is larger than the sum of its proper divisors (28879183430).

55721121562 is a wasteful number, since it uses less digits than its factorization.

55721121562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46173.

The product of its digits is 42000, while the sum is 37.

The spelling of 55721121562 in words is "fifty-five billion, seven hundred twenty-one million, one hundred twenty-one thousand, five hundred sixty-two".