55487197287 has 10 divisors (see below), whose sum is σ = 82888282488. Its totient is φ = 36991464804.

The previous prime is 55487197279. The next prime is 55487197313. The reversal of 55487197287 is 78279178455.

55487197287 is a `hidden beast` number, since 5 + 5 + 487 + 1 + 9 + 72 + 87 = 666.

It is not a de Polignac number, because 55487197287 - 2³ = 55487197279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55487190287) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 342513483 + ... + 342513644.

Almost surely, 2^55487197287 is an apocalyptic number.

55487197287 is a deficient number, since it is larger than the sum of its proper divisors (27401085201).

55487197287 is an equidigital number, since it uses as much as digits as its factorization.

55487197287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685027139 (or 685027130 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 63.

The spelling of 55487197287 in words is "fifty-five billion, four hundred eighty-seven million, one hundred ninety-seven thousand, two hundred eighty-seven".