8981519957 has 2 divisors, whose sum is σ = 8981519958. Its totient is φ = 8981519956.

The previous prime is 8981519929. The next prime is 8981519999. The reversal of 8981519957 is 7599151898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4972224196 + 4009295761 = 70514^2 + 63319^2 .

It is a cyclic number.

It is not a de Polignac number, because 8981519957 - 2¹⁰ = 8981518933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8981519957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8981519927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4490759978 + 4490759979.

It is an arithmetic number, because the mean of its divisors is an integer number (4490759979).

Almost surely, 2^8981519957 is an apocalyptic number.

It is an amenable number.

8981519957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8981519957 is an equidigital number, since it uses as much as digits as its factorization.

8981519957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 62.

The square root of 8981519957 is about 94770.8813771403. The cubic root of 8981519957 is about 2078.6591423601.

The spelling of 8981519957 in words is "eight billion, nine hundred eighty-one million, five hundred nineteen thousand, nine hundred fifty-seven".