4638390971615 has 4 divisors (see below), whose sum is σ = 5566069165944. Its totient is φ = 3710712777288.

The previous prime is 4638390971519. The next prime is 4638390971651. The reversal of 4638390971615 is 5161790938364.

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

It is a cyclic number.

It is not a de Polignac number, because 4638390971615 - 2³⁸ = 4363513064671 is a prime.

It is a Duffinian number.

It is a congruent 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, 463839097157 + ... + 463839097166.

It is an arithmetic number, because the mean of its divisors is an integer number (1391517291486).

Almost surely, 2^{4638390971615} is an apocalyptic number.

4638390971615 is a deficient number, since it is larger than the sum of its proper divisors (927678194329).

4638390971615 is an equidigital number, since it uses as much as digits as its factorization.

4638390971615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927678194328.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 4638390971615 in words is "four trillion, six hundred thirty-eight billion, three hundred ninety million, nine hundred seventy-one thousand, six hundred fifteen".