2791857364157 has 4 divisors (see below), whose sum is σ = 2791924451676. Its totient is φ = 2791790276640.

The previous prime is 2791857364069. The next prime is 2791857364159. The reversal of 2791857364157 is 7514637581972.

It is a happy number.

2791857364157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2628399682756 + 163457681401 = 1621234^2 + 404299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2791857364157 - 2¹⁶ = 2791857298621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2791857364093 and 2791857364102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791857364159) 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, 33481298 + ... + 33564579.

It is an arithmetic number, because the mean of its divisors is an integer number (697981112919).

Almost surely, 2^{2791857364157} is an apocalyptic number.

It is an amenable number.

2791857364157 is a deficient number, since it is larger than the sum of its proper divisors (67087519).

2791857364157 is an equidigital number, since it uses as much as digits as its factorization.

2791857364157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67087518.

The product of its digits is 88905600, while the sum is 65.

The spelling of 2791857364157 in words is "two trillion, seven hundred ninety-one billion, eight hundred fifty-seven million, three hundred sixty-four thousand, one hundred fifty-seven".