38378558397 has 4 divisors (see below), whose sum is σ = 51171411200. Its totient is φ = 25585705596.

The previous prime is 38378558329. The next prime is 38378558453. The reversal of 38378558397 is 79385587383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79385587383 = 3 ⋅26461862461.

It is a de Polignac number, because none of the positive numbers 2^k-38378558397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38378558297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6396426397 + ... + 6396426402.

It is an arithmetic number, because the mean of its divisors is an integer number (12792852800).

Almost surely, 2^38378558397 is an apocalyptic number.

It is an amenable number.

38378558397 is a deficient number, since it is larger than the sum of its proper divisors (12792852803).

38378558397 is a wasteful number, since it uses less digits than its factorization.

38378558397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12792852802.

The product of its digits is 152409600, while the sum is 66.

The spelling of 38378558397 in words is "thirty-eight billion, three hundred seventy-eight million, five hundred fifty-eight thousand, three hundred ninety-seven".