6136401665 has 4 divisors (see below), whose sum is σ = 7363682004. Its totient is φ = 4909121328.

The previous prime is 6136401631. The next prime is 6136401701. The reversal of 6136401665 is 5661046316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2492106241 + 3644295424 = 49921^2 + 60368^2 .

It is a cyclic number.

It is not a de Polignac number, because 6136401665 - 2²⁴ = 6119624449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613640162 + ... + 613640171.

It is an arithmetic number, because the mean of its divisors is an integer number (1840920501).

Almost surely, 2^6136401665 is an apocalyptic number.

It is an amenable number.

6136401665 is a deficient number, since it is larger than the sum of its proper divisors (1227280339).

6136401665 is a wasteful number, since it uses less digits than its factorization.

6136401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227280338.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 6136401665 is about 78335.1879106701. The cubic root of 6136401665 is about 1830.7874486446.

The spelling of 6136401665 in words is "six billion, one hundred thirty-six million, four hundred one thousand, six hundred sixty-five".