5641857157 has 4 divisors (see below), whose sum is σ = 5642693280. Its totient is φ = 5641021036.

The previous prime is 5641857083. The next prime is 5641857161. The reversal of 5641857157 is 7517581465.

It is a happy number.

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 5641857157 - 2¹⁵ = 5641824389 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5641857157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641857257) 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, 407857 + ... + 421462.

It is an arithmetic number, because the mean of its divisors is an integer number (1410673320).

Almost surely, 2^5641857157 is an apocalyptic number.

It is an amenable number.

5641857157 is a deficient number, since it is larger than the sum of its proper divisors (836123).

5641857157 is an equidigital number, since it uses as much as digits as its factorization.

5641857157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836122.

The product of its digits is 1176000, while the sum is 49.

The square root of 5641857157 is about 75112.2969759280. The cubic root of 5641857157 is about 1780.2214466947.

The spelling of 5641857157 in words is "five billion, six hundred forty-one million, eight hundred fifty-seven thousand, one hundred fifty-seven".