4961161157 has 4 divisors (see below), whose sum is σ = 5176863840. Its totient is φ = 4745458476.

The previous prime is 4961161141. The next prime is 4961161199. The reversal of 4961161157 is 7511611694.

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: 7511611694 = 2 ⋅3755805847.

It is a cyclic number.

It is not a de Polignac number, because 4961161157 - 2⁴ = 4961161141 is a prime.

It is a super-2 number, since 2×4961161157² = 49226240051451157298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4961131157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107851307 + ... + 107851352.

It is an arithmetic number, because the mean of its divisors is an integer number (1294215960).

Almost surely, 2^4961161157 is an apocalyptic number.

It is an amenable number.

4961161157 is a deficient number, since it is larger than the sum of its proper divisors (215702683).

4961161157 is a wasteful number, since it uses less digits than its factorization.

4961161157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215702682.

The product of its digits is 45360, while the sum is 41.

The square root of 4961161157 is about 70435.5106249681. The cubic root of 4961161157 is about 1705.5368670225.

The spelling of 4961161157 in words is "four billion, nine hundred sixty-one million, one hundred sixty-one thousand, one hundred fifty-seven".