2498647861 has 2 divisors, whose sum is σ = 2498647862. Its totient is φ = 2498647860.

The previous prime is 2498647841. The next prime is 2498647867. The reversal of 2498647861 is 1687468942.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1944280836 + 554367025 = 44094^2 + 23545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2498647861 - 2¹⁷ = 2498516789 is a prime.

It is a super-2 number, since 2×2498647861² = 12486482266559750642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2498647867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249323930 + 1249323931.

It is an arithmetic number, because the mean of its divisors is an integer number (1249323931).

Almost surely, 2^2498647861 is an apocalyptic number.

It is an amenable number.

2498647861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2498647861 is an equidigital number, since it uses as much as digits as its factorization.

2498647861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 2498647861 is about 49986.4767812255. The cubic root of 2498647861 is about 1356.9640795097.

The spelling of 2498647861 in words is "two billion, four hundred ninety-eight million, six hundred forty-seven thousand, eight hundred sixty-one".