6113561131 has 4 divisors (see below), whose sum is σ = 6473182392. Its totient is φ = 5753939872.

The previous prime is 6113561107. The next prime is 6113561177. The reversal of 6113561131 is 1311653116.

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

It is a cyclic number.

It is not a de Polignac number, because 6113561131 - 2⁵ = 6113561099 is a prime.

It is a super-2 number, since 2×6113561131² = 74751259404947998322, which contains 22 as substring.

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 6113561131.

It is not an unprimeable number, because it can be changed into a prime (6113561191) 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, 179810605 + ... + 179810638.

It is an arithmetic number, because the mean of its divisors is an integer number (1618295598).

Almost surely, 2^6113561131 is an apocalyptic number.

6113561131 is a deficient number, since it is larger than the sum of its proper divisors (359621261).

6113561131 is a wasteful number, since it uses less digits than its factorization.

6113561131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359621260.

The product of its digits is 1620, while the sum is 28.

The square root of 6113561131 is about 78189.2648066216. The cubic root of 6113561131 is about 1828.5131433515.

The spelling of 6113561131 in words is "six billion, one hundred thirteen million, five hundred sixty-one thousand, one hundred thirty-one".