2057151111161 has 4 divisors (see below), whose sum is σ = 2057162096292. Its totient is φ = 2057140126032.

The previous prime is 2057151111151. The next prime is 2057151111167. The reversal of 2057151111161 is 1611111517502.

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 421486608400 + 1635664502761 = 649220^2 + 1278931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2057151111161 - 2⁶ = 2057151111097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2057151111167) 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, 5206706 + ... + 5587851.

It is an arithmetic number, because the mean of its divisors is an integer number (514290524073).

Almost surely, 2^{2057151111161} is an apocalyptic number.

It is an amenable number.

2057151111161 is a deficient number, since it is larger than the sum of its proper divisors (10985131).

2057151111161 is a wasteful number, since it uses less digits than its factorization.

2057151111161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985130.

The product of its (nonzero) digits is 2100, while the sum is 32.

Adding to 2057151111161 its reverse (1611111517502), we get a palindrome (3668262628663).

The spelling of 2057151111161 in words is "two trillion, fifty-seven billion, one hundred fifty-one million, one hundred eleven thousand, one hundred sixty-one".