1137645638 has 8 divisors (see below), whose sum is σ = 1730503440. Its totient is φ = 560811160.

The previous prime is 1137645631. The next prime is 1137645643. The reversal of 1137645638 is 8365467311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137645631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4005653 + ... + 4005936.

It is an arithmetic number, because the mean of its divisors is an integer number (216312930).

Almost surely, 2^1137645638 is an apocalyptic number.

1137645638 is a deficient number, since it is larger than the sum of its proper divisors (592857802).

1137645638 is an equidigital number, since it uses as much as digits as its factorization.

1137645638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011662.

The product of its digits is 362880, while the sum is 44.

The square root of 1137645638 is about 33729.0029203355. The cubic root of 1137645638 is about 1043.9242879236.

The spelling of 1137645638 in words is "one billion, one hundred thirty-seven million, six hundred forty-five thousand, six hundred thirty-eight".