6161433981 has 16 divisors (see below), whose sum is σ = 9156312000. Its totient is φ = 3662523648.

The previous prime is 6161433919. The next prime is 6161434007. The reversal of 6161433981 is 1893341616.

It is not a de Polignac number, because 6161433981 - 2¹¹ = 6161431933 is a prime.

It is a super-2 number, since 2×6161433981² = 75926537404443016722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161433281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3178306 + ... + 3180243.

It is an arithmetic number, because the mean of its divisors is an integer number (572269500).

Almost surely, 2^6161433981 is an apocalyptic number.

It is an amenable number.

6161433981 is a deficient number, since it is larger than the sum of its proper divisors (2994878019).

6161433981 is a wasteful number, since it uses less digits than its factorization.

6161433981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6358588.

The product of its digits is 93312, while the sum is 42.

The square root of 6161433981 is about 78494.8022546716. The cubic root of 6161433981 is about 1833.2735241719.

The spelling of 6161433981 in words is "six billion, one hundred sixty-one million, four hundred thirty-three thousand, nine hundred eighty-one".