38561379257 has 4 divisors (see below), whose sum is σ = 39891082020. Its totient is φ = 37231676496.

The previous prime is 38561379221. The next prime is 38561379319. The reversal of 38561379257 is 75297316583.

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 10214942761 + 28346436496 = 101069^2 + 168364^2 .

It is a cyclic number.

It is not a de Polignac number, because 38561379257 - 2⁶ = 38561379193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38561379557) 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, 664851338 + ... + 664851395.

It is an arithmetic number, because the mean of its divisors is an integer number (9972770505).

Almost surely, 2^38561379257 is an apocalyptic number.

It is an amenable number.

38561379257 is a deficient number, since it is larger than the sum of its proper divisors (1329702763).

38561379257 is a wasteful number, since it uses less digits than its factorization.

38561379257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329702762.

The product of its digits is 9525600, while the sum is 56.

The spelling of 38561379257 in words is "thirty-eight billion, five hundred sixty-one million, three hundred seventy-nine thousand, two hundred fifty-seven".