264788157 has 4 divisors (see below), whose sum is σ = 353050880. Its totient is φ = 176525436.

The previous prime is 264788149. The next prime is 264788179. The reversal of 264788157 is 751887462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 264788157 - 2³ = 264788149 is a prime.

It is a super-2 number, since 2×264788157² = 140225536174913298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264788197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44131357 + ... + 44131362.

It is an arithmetic number, because the mean of its divisors is an integer number (88262720).

Almost surely, 2^264788157 is an apocalyptic number.

It is an amenable number.

264788157 is a deficient number, since it is larger than the sum of its proper divisors (88262723).

264788157 is an equidigital number, since it uses as much as digits as its factorization.

264788157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88262722.

The product of its digits is 752640, while the sum is 48.

The square root of 264788157 is about 16272.3125891804. The cubic root of 264788157 is about 642.1446258541.

The spelling of 264788157 in words is "two hundred sixty-four million, seven hundred eighty-eight thousand, one hundred fifty-seven".