100420440656 has 20 divisors (see below), whose sum is σ = 194733679104. Its totient is φ = 50166588000.

The previous prime is 100420440551. The next prime is 100420440671. The reversal of 100420440656 is 656044024001.

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, 2708030 + ... + 2744861.

Almost surely, 2^100420440656 is an apocalyptic number.

100420440656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

100420440656 is a deficient number, since it is larger than the sum of its proper divisors (94313238448).

100420440656 is a wasteful number, since it uses less digits than its factorization.

100420440656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454050 (or 5454044 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 100420440656 its reverse (656044024001), we get a palindrome (756464464657).

The spelling of 100420440656 in words is "one hundred billion, four hundred twenty million, four hundred forty thousand, six hundred fifty-six".