5142988661 has 2 divisors, whose sum is σ = 5142988662. Its totient is φ = 5142988660.

The previous prime is 5142988657. The next prime is 5142988667. The reversal of 5142988661 is 1668892415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5039580100 + 103408561 = 70990^2 + 10169^2 .

It is a cyclic number.

It is not a de Polignac number, because 5142988661 - 2² = 5142988657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5142988667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571494330 + 2571494331.

It is an arithmetic number, because the mean of its divisors is an integer number (2571494331).

Almost surely, 2^5142988661 is an apocalyptic number.

It is an amenable number.

5142988661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5142988661 is an equidigital number, since it uses as much as digits as its factorization.

5142988661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 50.

The square root of 5142988661 is about 71714.6335206421. The cubic root of 5142988661 is about 1726.1234617793.

The spelling of 5142988661 in words is "five billion, one hundred forty-two million, nine hundred eighty-eight thousand, six hundred sixty-one".