55420153550 has 24 divisors (see below), whose sum is σ = 103091168856. Its totient is φ = 22165979040.

The previous prime is 55420153507. The next prime is 55420153573. The reversal of 55420153550 is 5535102455.

It is a self number, because there is not a number n which added to its sum of digits gives 55420153550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555809 + ... + 647891.

It is an arithmetic number, because the mean of its divisors is an integer number (4295465369).

Almost surely, 2^55420153550 is an apocalyptic number.

55420153550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55420153550 is a deficient number, since it is larger than the sum of its proper divisors (47671015306).

55420153550 is a wasteful number, since it uses less digits than its factorization.

55420153550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104132 (or 104127 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 55420153550 in words is "fifty-five billion, four hundred twenty million, one hundred fifty-three thousand, five hundred fifty".