100556140655 has 4 divisors (see below), whose sum is σ = 120667368792. Its totient is φ = 80444912520.

The previous prime is 100556140639. The next prime is 100556140681. The reversal of 100556140655 is 556041655001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556041655001 = 7 ⋅79434522143.

It is not a de Polignac number, because 100556140655 - 2⁴ = 100556140639 is a prime.

It is a super-2 number, since 2×100556140655² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055614061 + ... + 10055614070.

It is an arithmetic number, because the mean of its divisors is an integer number (30166842198).

Almost surely, 2^100556140655 is an apocalyptic number.

100556140655 is a deficient number, since it is larger than the sum of its proper divisors (20111228137).

100556140655 is an equidigital number, since it uses as much as digits as its factorization.

100556140655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20111228136.

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 100556140655 its reverse (556041655001), we get a palindrome (656597795656).

The spelling of 100556140655 in words is "one hundred billion, five hundred fifty-six million, one hundred forty thousand, six hundred fifty-five".