1264644634 has 32 divisors (see below), whose sum is σ = 2095595712. Its totient is φ = 567600000.

The previous prime is 1264644629. The next prime is 1264644643. The reversal of 1264644634 is 4364464621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334949 + ... + 1335895.

It is an arithmetic number, because the mean of its divisors is an integer number (65487366).

Almost surely, 2^1264644634 is an apocalyptic number.

1264644634 is a deficient number, since it is larger than the sum of its proper divisors (830951078).

1264644634 is a wasteful number, since it uses less digits than its factorization.

1264644634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its digits is 331776, while the sum is 40.

The square root of 1264644634 is about 35561.8423875929. The cubic root of 1264644634 is about 1081.4078102873.

It can be divided in two parts, 12 and 64644634, that added together give a palindrome (64644646).

The spelling of 1264644634 in words is "one billion, two hundred sixty-four million, six hundred forty-four thousand, six hundred thirty-four".