55973265421 has 16 divisors (see below), whose sum is σ = 58229221248. Its totient is φ = 53764603200.

The previous prime is 55973265407. The next prime is 55973265433. The reversal of 55973265421 is 12456237955.

It is a cyclic number.

It is not a de Polignac number, because 55973265421 - 2²¹ = 55971168269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55973266421) 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, 1188951 + ... + 1235131.

It is an arithmetic number, because the mean of its divisors is an integer number (3639326328).

Almost surely, 2^55973265421 is an apocalyptic number.

It is an amenable number.

55973265421 is a deficient number, since it is larger than the sum of its proper divisors (2255955827).

55973265421 is a wasteful number, since it uses less digits than its factorization.

55973265421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46692.

The product of its digits is 2268000, while the sum is 49.

The spelling of 55973265421 in words is "fifty-five billion, nine hundred seventy-three million, two hundred sixty-five thousand, four hundred twenty-one".