1137645621 has 16 divisors (see below), whose sum is σ = 1926172800. Its totient is φ = 650083104.

The previous prime is 1137645617. The next prime is 1137645629. The reversal of 1137645621 is 1265467311.

1137645621 is a `hidden beast` number, since 1 + 1 + 3 + 7 + 645 + 6 + 2 + 1 = 666.

It is not a de Polignac number, because 1137645621 - 2² = 1137645617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137645629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3009456 + ... + 3009833.

It is an arithmetic number, because the mean of its divisors is an integer number (120385800).

Almost surely, 2^1137645621 is an apocalyptic number.

It is an amenable number.

1137645621 is a deficient number, since it is larger than the sum of its proper divisors (788527179).

1137645621 is an equidigital number, since it uses as much as digits as its factorization.

1137645621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019305 (or 6019299 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1137645621 is about 33729.0026683269. The cubic root of 1137645621 is about 1043.9242827237.

The spelling of 1137645621 in words is "one billion, one hundred thirty-seven million, six hundred forty-five thousand, six hundred twenty-one".