2889661157 has 4 divisors (see below), whose sum is σ = 2932790496. Its totient is φ = 2846531820.

The previous prime is 2889661141. The next prime is 2889661169. The reversal of 2889661157 is 7511669882.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7511669882 = 2 ⋅3755834941.

It is a cyclic number.

It is not a de Polignac number, because 2889661157 - 2⁴ = 2889661141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2889661099 and 2889661108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2889661757) 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, 21564569 + ... + 21564702.

It is an arithmetic number, because the mean of its divisors is an integer number (733197624).

Almost surely, 2^2889661157 is an apocalyptic number.

It is an amenable number.

2889661157 is a deficient number, since it is larger than the sum of its proper divisors (43129339).

2889661157 is an equidigital number, since it uses as much as digits as its factorization.

2889661157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43129338.

The product of its digits is 1451520, while the sum is 53.

The square root of 2889661157 is about 53755.5686138655. The cubic root of 2889661157 is about 1424.3464584148.

The spelling of 2889661157 in words is "two billion, eight hundred eighty-nine million, six hundred sixty-one thousand, one hundred fifty-seven".