55990252987 has 8 divisors (see below), whose sum is σ = 56223789552. Its totient is φ = 55756800000.

The previous prime is 55990252979. The next prime is 55990253017. The reversal of 55990252987 is 78925209955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55990252987 - 2³ = 55990252979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55990252907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572987 + ... + 1608187.

It is an arithmetic number, because the mean of its divisors is an integer number (7027973694).

Almost surely, 2^55990252987 is an apocalyptic number.

55990252987 is a deficient number, since it is larger than the sum of its proper divisors (233536565).

55990252987 is a wasteful number, since it uses less digits than its factorization.

55990252987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41789.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 55990252987 in words is "fifty-five billion, nine hundred ninety million, two hundred fifty-two thousand, nine hundred eighty-seven".