55297618487 has 32 divisors (see below), whose sum is σ = 59635699200. Its totient is φ = 51120720000.

The previous prime is 55297618469. The next prime is 55297618507. The reversal of 55297618487 is 78481679255.

It is a cyclic number.

It is not a de Polignac number, because 55297618487 - 2²⁶ = 55230509623 is a prime.

It is a super-2 number, since 2×55297618487² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55297618447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66703589 + ... + 66704417.

It is an arithmetic number, because the mean of its divisors is an integer number (1863615600).

Almost surely, 2^55297618487 is an apocalyptic number.

55297618487 is a deficient number, since it is larger than the sum of its proper divisors (4338080713).

55297618487 is a wasteful number, since it uses less digits than its factorization.

55297618487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367.

The product of its digits is 33868800, while the sum is 62.

The spelling of 55297618487 in words is "fifty-five billion, two hundred ninety-seven million, six hundred eighteen thousand, four hundred eighty-seven".