38977915565 has 8 divisors (see below), whose sum is σ = 48282321408. Its totient is φ = 30176450640.

The previous prime is 38977915553. The next prime is 38977915619. The reversal of 38977915565 is 56551977983.

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

It is not a de Polignac number, because 38977915565 - 2²² = 38973721261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125735057 + ... + 125735366.

It is an arithmetic number, because the mean of its divisors is an integer number (6035290176).

Almost surely, 2^38977915565 is an apocalyptic number.

It is an amenable number.

38977915565 is a deficient number, since it is larger than the sum of its proper divisors (9304405843).

38977915565 is a wasteful number, since it uses less digits than its factorization.

38977915565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251470459.

The product of its digits is 71442000, while the sum is 65.

The spelling of 38977915565 in words is "thirty-eight billion, nine hundred seventy-seven million, nine hundred fifteen thousand, five hundred sixty-five".