100551521655 has 96 divisors (see below), whose sum is σ = 189726351360. Its totient is φ = 48969204480.

The previous prime is 100551521627. The next prime is 100551521659. The reversal of 100551521655 is 556125155001.

100551521655 is a `hidden beast` number, since 1 + 0 + 0 + 551 + 52 + 1 + 6 + 55 = 666.

It is not a de Polignac number, because 100551521655 - 2¹³ = 100551513463 is a prime.

It is a super-2 number, since 2×100551521655² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100551521659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28156020 + ... + 28159590.

It is an arithmetic number, because the mean of its divisors is an integer number (1976316160).

Almost surely, 2^100551521655 is an apocalyptic number.

100551521655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100551521655 is a deficient number, since it is larger than the sum of its proper divisors (89174829705).

100551521655 is a wasteful number, since it uses less digits than its factorization.

100551521655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101 (or 4098 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

Adding to 100551521655 its reverse (556125155001), we get a palindrome (656676676656).

The spelling of 100551521655 in words is "one hundred billion, five hundred fifty-one million, five hundred twenty-one thousand, six hundred fifty-five".