1264163625 has 64 divisors (see below), whose sum is σ = 2345241600. Its totient is φ = 671932800.

The previous prime is 1264163611. The next prime is 1264163629. The reversal of 1264163625 is 5263614621.

1264163625 is a `hidden beast` number, since 1 + 2 + 641 + 6 + 3 + 6 + 2 + 5 = 666.

It is not a de Polignac number, because 1264163625 - 2⁶ = 1264163561 is a prime.

Its product of digits (51840) is a multiple of the sum of its prime factors (1296).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264163625.

It is not an unprimeable number, because it can be changed into a prime (1264163629) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1562221 + ... + 1563029.

It is an arithmetic number, because the mean of its divisors is an integer number (36644400).

Almost surely, 2^1264163625 is an apocalyptic number.

1264163625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264163625 is a deficient number, since it is larger than the sum of its proper divisors (1081077975).

1264163625 is an equidigital number, since it uses as much as digits as its factorization.

1264163625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 1280 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1264163625 is about 35555.0787511433. The cubic root of 1264163625 is about 1081.2706880112.

The spelling of 1264163625 in words is "one billion, two hundred sixty-four million, one hundred sixty-three thousand, six hundred twenty-five".