55639887155 has 8 divisors (see below), whose sum is σ = 67682493312. Its totient is φ = 43902157248.

The previous prime is 55639887133. The next prime is 55639887157. The reversal of 55639887155 is 55178893655.

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 not a de Polignac number, because 55639887155 - 2¹⁰ = 55639886131 is a prime.

It is a super-2 number, since 2×55639887155² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55639887157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76218659 + ... + 76219388.

It is an arithmetic number, because the mean of its divisors is an integer number (8460311664).

Almost surely, 2^55639887155 is an apocalyptic number.

55639887155 is a deficient number, since it is larger than the sum of its proper divisors (12042606157).

55639887155 is a wasteful number, since it uses less digits than its factorization.

55639887155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152438125.

The product of its digits is 45360000, while the sum is 62.

The spelling of 55639887155 in words is "fifty-five billion, six hundred thirty-nine million, eight hundred eighty-seven thousand, one hundred fifty-five".