38956367691 has 40 divisors (see below), whose sum is σ = 60770904480. Its totient is φ = 24822661248.

The previous prime is 38956367683. The next prime is 38956367699. The reversal of 38956367691 is 19676365983.

38956367691 is a `hidden beast` number, since 3 + 8 + 9 + 563 + 6 + 7 + 69 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (38956367683) and next prime (38956367699).

It is not a de Polignac number, because 38956367691 - 2³ = 38956367683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38956367699) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2654911 + ... + 2669543.

It is an arithmetic number, because the mean of its divisors is an integer number (1519272612).

Almost surely, 2^38956367691 is an apocalyptic number.

38956367691 is a deficient number, since it is larger than the sum of its proper divisors (21814536789).

38956367691 is a wasteful number, since it uses less digits than its factorization.

38956367691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16097 (or 16088 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 63.

The spelling of 38956367691 in words is "thirty-eight billion, nine hundred fifty-six million, three hundred sixty-seven thousand, six hundred ninety-one".