100556864 has 14 divisors (see below), whose sum is σ = 199542654. Its totient is φ = 50278400.

The previous prime is 100556857. The next prime is 100556927. The reversal of 100556864 is 468655001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77440000 + 23116864 = 8800^2 + 4808^2 .

It is a super-3 number, since 3×100556864³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785537 + ... + 785664.

Almost surely, 2^100556864 is an apocalyptic number.

It is an amenable number.

100556864 is a deficient number, since it is larger than the sum of its proper divisors (98985790).

100556864 is an equidigital number, since it uses as much as digits as its factorization.

100556864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571213 (or 1571203 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 100556864 is about 10027.8045453629. The cubic root of 100556864 is about 465.0188669263.

The spelling of 100556864 in words is "one hundred million, five hundred fifty-six thousand, eight hundred sixty-four".