38157197569 has 8 divisors (see below), whose sum is σ = 38848163112. Its totient is φ = 37468343040.

The previous prime is 38157197539. The next prime is 38157197581. The reversal of 38157197569 is 96579175183.

It can be written as a sum of positive squares in 4 ways, for example, as 4324377600 + 33832819969 = 65760^2 + 183937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 38157197569 - 2²³ = 38148808961 is a prime.

It is a super-2 number, since 2×38157197569² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38157197539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491254 + ... + 563599.

It is an arithmetic number, because the mean of its divisors is an integer number (4856020389).

Almost surely, 2^38157197569 is an apocalyptic number.

It is an amenable number.

38157197569 is a deficient number, since it is larger than the sum of its proper divisors (690965543).

38157197569 is a wasteful number, since it uses less digits than its factorization.

38157197569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055507.

The product of its digits is 14288400, while the sum is 61.

The spelling of 38157197569 in words is "thirty-eight billion, one hundred fifty-seven million, one hundred ninety-seven thousand, five hundred sixty-nine".