100555060505550 has 144 divisors (see below), whose sum is σ = 307155270916080. Its totient is φ = 21632012989440.

The previous prime is 100555060505539. The next prime is 100555060505551. The reversal of 100555060505550 is 55505060555001.

It is a super-2 number, since 2×100555060505550² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555060505551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 402256245 + ... + 402506144.

It is an arithmetic number, because the mean of its divisors is an integer number (2133022714695).

Almost surely, 2^{100555060505550} is an apocalyptic number.

100555060505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100555060505550 is an abundant number, since it is smaller than the sum of its proper divisors (206600210410530).

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

100555060505550 is a wasteful number, since it uses less digits than its factorization.

100555060505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804762435 (or 804762423 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 100555060505550 in words is "one hundred trillion, five hundred fifty-five billion, sixty million, five hundred five thousand, five hundred fifty".