8001655400 has 24 divisors (see below), whose sum is σ = 18603849270. Its totient is φ = 3200662080.

The previous prime is 8001655391. The next prime is 8001655429. The reversal of 8001655400 is 45561008.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3251964676 + 4749690724 = 57026^2 + 68918^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20003939 + ... + 20004338.

Almost surely, 2^8001655400 is an apocalyptic number.

It is an amenable number.

8001655400 is an abundant number, since it is smaller than the sum of its proper divisors (10602193870).

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

8001655400 is a wasteful number, since it uses less digits than its factorization.

8001655400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40008293 (or 40008284 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 8001655400 is about 89451.9725886467. The cubic root of 8001655400 is about 2000.1379404860.

The spelling of 8001655400 in words is "eight billion, one million, six hundred fifty-five thousand, four hundred".