1521658164 has 24 divisors (see below), whose sum is σ = 3823654240. Its totient is φ = 468202464.

The previous prime is 1521658163. The next prime is 1521658169. The reversal of 1521658164 is 4618561251.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521658163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4876954 + ... + 4877265.

Almost surely, 2^1521658164 is an apocalyptic number.

It is an amenable number.

1521658164 is an abundant number, since it is smaller than the sum of its proper divisors (2301996076).

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

1521658164 is a wasteful number, since it uses less digits than its factorization.

1521658164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754239 (or 9754237 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The square root of 1521658164 is about 39008.4370873789. The cubic root of 1521658164 is about 1150.1973609603.

The spelling of 1521658164 in words is "one billion, five hundred twenty-one million, six hundred fifty-eight thousand, one hundred sixty-four".