1137644564 has 24 divisors (see below), whose sum is σ = 2321726400. Its totient is φ = 487561368.

The previous prime is 1137644503. The next prime is 1137644569. The reversal of 1137644564 is 4654467311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137644569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413222 + ... + 415965.

It is an arithmetic number, because the mean of its divisors is an integer number (96738600).

Almost surely, 2^1137644564 is an apocalyptic number.

1137644564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1137644564 is an abundant number, since it is smaller than the sum of its proper divisors (1184081836).

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

1137644564 is an equidigital number, since it uses as much as digits as its factorization.

1137644564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829212 (or 829196 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 1137644564 is about 33728.9869993156. The cubic root of 1137644564 is about 1043.9239594162.

The spelling of 1137644564 in words is "one billion, one hundred thirty-seven million, six hundred forty-four thousand, five hundred sixty-four".