7564633644 has 48 divisors (see below), whose sum is σ = 18648000000. Its totient is φ = 2382789696.

The previous prime is 7564633639. The next prime is 7564633679. The reversal of 7564633644 is 4463364657.

It is a junction number, because it is equal to n+sod(n) for n = 7564633593 and 7564633602.

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, 214894 + ... + 247605.

It is an arithmetic number, because the mean of its divisors is an integer number (388500000).

Almost surely, 2^7564633644 is an apocalyptic number.

It is an amenable number.

7564633644 is an abundant number, since it is smaller than the sum of its proper divisors (11083366356).

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

7564633644 is a wasteful number, since it uses less digits than its factorization.

7564633644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462582 (or 462580 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 48.

The square root of 7564633644 is about 86974.9023799395. The cubic root of 7564633644 is about 1963.0406819118.

The spelling of 7564633644 in words is "seven billion, five hundred sixty-four million, six hundred thirty-three thousand, six hundred forty-four".