57157571990391 has 16 divisors (see below), whose sum is σ = 76360622012928. Its totient is φ = 38029857740000.

The previous prime is 57157571990347. The next prime is 57157571990429. The reversal of 57157571990391 is 19309917575175.

It is a cyclic number.

It is not a de Polignac number, because 57157571990391 - 2¹⁵ = 57157571957623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57157571990291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5951235 + ... + 12236516.

It is an arithmetic number, because the mean of its divisors is an integer number (4772538875808).

Almost surely, 2^{57157571990391} is an apocalyptic number.

57157571990391 is a deficient number, since it is larger than the sum of its proper divisors (19203050022537).

57157571990391 is a wasteful number, since it uses less digits than its factorization.

57157571990391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18189822.

The product of its (nonzero) digits is 93767625, while the sum is 69.

The spelling of 57157571990391 in words is "fifty-seven trillion, one hundred fifty-seven billion, five hundred seventy-one million, nine hundred ninety thousand, three hundred ninety-one".