2156527404 has 18 divisors (see below), whose sum is σ = 5451222140. Its totient is φ = 718842456.

The previous prime is 2156527397. The next prime is 2156527409. The reversal of 2156527404 is 4047256512.

It is a happy number.

2156527404 is a `hidden beast` number, since 21 + 565 + 2 + 74 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2156527404² = 9301220888405958432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 59903539 = 2156527404 / (2 + 1 + 5 + 6 + 5 + 2 + 7 + 4 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (2156527409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29951734 + ... + 29951805.

Almost surely, 2^2156527404 is an apocalyptic number.

It is an amenable number.

2156527404 is an abundant number, since it is smaller than the sum of its proper divisors (3294694736).

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

2156527404 is a wasteful number, since it uses less digits than its factorization.

2156527404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59903549 (or 59903544 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 2156527404 is about 46438.4259423163. The cubic root of 2156527404 is about 1291.9677127084.

The spelling of 2156527404 in words is "two billion, one hundred fifty-six million, five hundred twenty-seven thousand, four hundred four".