55508903890387 has 8 divisors (see below), whose sum is σ = 59148491072256. Its totient is φ = 51910911990912.

The previous prime is 55508903890369. The next prime is 55508903890469. The reversal of 55508903890387 is 78309830980555.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55508903890387 is a prime.

It is a super-2 number, since 2×55508903890387² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55508903890487) 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, 10398817843 + ... + 10398823180.

It is an arithmetic number, because the mean of its divisors is an integer number (7393561384032).

Almost surely, 2^{55508903890387} is an apocalyptic number.

55508903890387 is a deficient number, since it is larger than the sum of its proper divisors (3639587181869).

55508903890387 is a wasteful number, since it uses less digits than its factorization.

55508903890387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20797641197.

The product of its (nonzero) digits is 326592000, while the sum is 70.

The spelling of 55508903890387 in words is "fifty-five trillion, five hundred eight billion, nine hundred three million, eight hundred ninety thousand, three hundred eighty-seven".