55660005635421 has 64 divisors (see below), whose sum is σ = 83600131055616. Its totient is φ = 32643477446400.

The previous prime is 55660005635417. The next prime is 55660005635431. The reversal of 55660005635421 is 12453650006655.

It is not a de Polignac number, because 55660005635421 - 2² = 55660005635417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55660005635431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288795930 + ... + 288988596.

It is an arithmetic number, because the mean of its divisors is an integer number (1306252047744).

Almost surely, 2^{55660005635421} is an apocalyptic number.

It is an amenable number.

55660005635421 is a deficient number, since it is larger than the sum of its proper divisors (27940125420195).

55660005635421 is a wasteful number, since it uses less digits than its factorization.

55660005635421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194002.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 55660005635421 in words is "fifty-five trillion, six hundred sixty billion, five million, six hundred thirty-five thousand, four hundred twenty-one".