263157664 has 48 divisors (see below), whose sum is σ = 645938496. Its totient is φ = 102528000.

The previous prime is 263157649. The next prime is 263157679. The reversal of 263157664 is 466751362.

It is an interprime number because it is at equal distance from previous prime (263157649) and next prime (263157679).

It is a super-2 number, since 2×263157664² = 138503912243873792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50937 + ... + 55864.

It is an arithmetic number, because the mean of its divisors is an integer number (13457052).

Almost surely, 2^263157664 is an apocalyptic number.

It is an amenable number.

263157664 is an abundant number, since it is smaller than the sum of its proper divisors (382780832).

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

263157664 is a wasteful number, since it uses less digits than its factorization.

263157664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106829 (or 106821 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 263157664 is about 16222.1350012876. The cubic root of 263157664 is about 640.8238608781.

The spelling of 263157664 in words is "two hundred sixty-three million, one hundred fifty-seven thousand, six hundred sixty-four".