1538153964 has 18 divisors (see below), whose sum is σ = 3888111500. Its totient is φ = 512717976.

The previous prime is 1538153933. The next prime is 1538153977. The reversal of 1538153964 is 4693518351.

1538153964 is a `hidden beast` number, since 1 + 53 + 8 + 1 + 539 + 64 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21363214 + ... + 21363285.

Almost surely, 2^1538153964 is an apocalyptic number.

It is an amenable number.

1538153964 is an abundant number, since it is smaller than the sum of its proper divisors (2349957536).

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

1538153964 is a wasteful number, since it uses less digits than its factorization.

1538153964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42726509 (or 42726504 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 1538153964 is about 39219.3060111981. The cubic root of 1538153964 is about 1154.3387365681.

The spelling of 1538153964 in words is "one billion, five hundred thirty-eight million, one hundred fifty-three thousand, nine hundred sixty-four".