55489702621 has 16 divisors (see below), whose sum is σ = 57647116800. Its totient is φ = 53372592000.

The previous prime is 55489702603. The next prime is 55489702627. The reversal of 55489702621 is 12620798455.

It is a cyclic number.

It is not a de Polignac number, because 55489702621 - 2⁵ = 55489702589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55489702627) 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, 2258320 + ... + 2282758.

It is an arithmetic number, because the mean of its divisors is an integer number (3602944800).

Almost surely, 2^55489702621 is an apocalyptic number.

It is an amenable number.

55489702621 is a deficient number, since it is larger than the sum of its proper divisors (2157414179).

55489702621 is a wasteful number, since it uses less digits than its factorization.

55489702621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25260.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 55489702621 in words is "fifty-five billion, four hundred eighty-nine million, seven hundred two thousand, six hundred twenty-one".