38555917557 has 8 divisors (see below), whose sum is σ = 51421023360. Its totient is φ = 25697378400.

The previous prime is 38555917507. The next prime is 38555917627. The reversal of 38555917557 is 75571955583.

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

It is not a de Polignac number, because 38555917557 - 2²³ = 38547528949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38555917557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38555917507) 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, 1627944 + ... + 1651457.

It is an arithmetic number, because the mean of its divisors is an integer number (6427627920).

Almost surely, 2^38555917557 is an apocalyptic number.

It is an amenable number.

38555917557 is a deficient number, since it is larger than the sum of its proper divisors (12865105803).

38555917557 is a wasteful number, since it uses less digits than its factorization.

38555917557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283323.

The product of its digits is 33075000, while the sum is 60.

The spelling of 38555917557 in words is "thirty-eight billion, five hundred fifty-five million, nine hundred seventeen thousand, five hundred fifty-seven".