24949295981 has 2 divisors, whose sum is σ = 24949295982. Its totient is φ = 24949295980.

The previous prime is 24949295947. The next prime is 24949296007. The reversal of 24949295981 is 18959294942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22799490025 + 2149805956 = 150995^2 + 46366^2 .

It is a cyclic number.

It is not a de Polignac number, because 24949295981 - 2²² = 24945101677 is a prime.

It is a super-2 number, since 2×24949295981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24949295281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12474647990 + 12474647991.

It is an arithmetic number, because the mean of its divisors is an integer number (12474647991).

Almost surely, 2^24949295981 is an apocalyptic number.

It is an amenable number.

24949295981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24949295981 is an equidigital number, since it uses as much as digits as its factorization.

24949295981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The spelling of 24949295981 in words is "twenty-four billion, nine hundred forty-nine million, two hundred ninety-five thousand, nine hundred eighty-one".