137640387515 has 8 divisors (see below), whose sum is σ = 165492964080. Its totient is φ = 109895977312.

The previous prime is 137640387487. The next prime is 137640387523. The reversal of 137640387515 is 515783046731.

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

It is a cyclic number.

It is not a de Polignac number, because 137640387515 - 2⁸ = 137640387259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27038789 + ... + 27043878.

It is an arithmetic number, because the mean of its divisors is an integer number (20686620510).

Almost surely, 2^137640387515 is an apocalyptic number.

137640387515 is a deficient number, since it is larger than the sum of its proper divisors (27852576565).

137640387515 is an equidigital number, since it uses as much as digits as its factorization.

137640387515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54083181.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 137640387515 in words is "one hundred thirty-seven billion, six hundred forty million, three hundred eighty-seven thousand, five hundred fifteen".