38115666457 has 4 divisors (see below), whose sum is σ = 41580727056. Its totient is φ = 34650605860.

The previous prime is 38115666431. The next prime is 38115666487. The reversal of 38115666457 is 75466651183.

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.

It is a cyclic number.

It is not a de Polignac number, because 38115666457 - 2¹¹ = 38115664409 is a prime.

It is a super-2 number, since 2×38115666457² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38115666427) 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, 1732530283 + ... + 1732530304.

It is an arithmetic number, because the mean of its divisors is an integer number (10395181764).

Almost surely, 2^38115666457 is an apocalyptic number.

It is an amenable number.

38115666457 is a deficient number, since it is larger than the sum of its proper divisors (3465060599).

38115666457 is a wasteful number, since it uses less digits than its factorization.

38115666457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465060598.

The product of its digits is 3628800, while the sum is 52.

The spelling of 38115666457 in words is "thirty-eight billion, one hundred fifteen million, six hundred sixty-six thousand, four hundred fifty-seven".