5161758981 has 8 divisors (see below), whose sum is σ = 7119667680. Its totient is φ = 3322511472.

The previous prime is 5161758949. The next prime is 5161758989. The reversal of 5161758981 is 1898571615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5161758981 - 2⁵ = 5161758949 is a prime.

It is a super-2 number, since 2×5161758981² = 53287511555868316722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161758989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29665195 + ... + 29665368.

It is an arithmetic number, because the mean of its divisors is an integer number (889958460).

Almost surely, 2^5161758981 is an apocalyptic number.

It is an amenable number.

5161758981 is a deficient number, since it is larger than the sum of its proper divisors (1957908699).

5161758981 is a wasteful number, since it uses less digits than its factorization.

5161758981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59330595.

The product of its digits is 604800, while the sum is 51.

The square root of 5161758981 is about 71845.3824612271. The cubic root of 5161758981 is about 1728.2208513886.

The spelling of 5161758981 in words is "five billion, one hundred sixty-one million, seven hundred fifty-eight thousand, nine hundred eighty-one".