157578664 has 8 divisors (see below), whose sum is σ = 295460010. Its totient is φ = 78789328.

The previous prime is 157578653. The next prime is 157578667. The reversal of 157578664 is 466875751.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 17156164 = 11850^2 + 4142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (157578667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9848659 + ... + 9848674.

Almost surely, 2^157578664 is an apocalyptic number.

It is an amenable number.

157578664 is a deficient number, since it is larger than the sum of its proper divisors (137881346).

157578664 is a wasteful number, since it uses less digits than its factorization.

157578664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19697339 (or 19697335 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 49.

The square root of 157578664 is about 12553.0340555580. The cubic root of 157578664 is about 540.1310427284.

The spelling of 157578664 in words is "one hundred fifty-seven million, five hundred seventy-eight thousand, six hundred sixty-four".