55120150505550 has 96 divisors (see below), whose sum is σ = 153613776089088. Its totient is φ = 12978122382720.

The previous prime is 55120150505513. The next prime is 55120150505587. The reversal of 55120150505550 is 5550505102155.

It is an interprime number because it is at equal distance from previous prime (55120150505513) and next prime (55120150505587).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 55120150505499 and 55120150505508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 614449582 + ... + 614539281.

It is an arithmetic number, because the mean of its divisors is an integer number (1600143500928).

Almost surely, 2^{55120150505550} is an apocalyptic number.

55120150505550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55120150505550 is an abundant number, since it is smaller than the sum of its proper divisors (98493625583538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55120150505550 is a wasteful number, since it uses less digits than its factorization.

55120150505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228988914 (or 1228988909 counting only the distinct ones).

The product of its (nonzero) digits is 156250, while the sum is 39.

The spelling of 55120150505550 in words is "fifty-five trillion, one hundred twenty billion, one hundred fifty million, five hundred five thousand, five hundred fifty".