2495963621 has 2 divisors, whose sum is σ = 2495963622. Its totient is φ = 2495963620.

The previous prime is 2495963599. The next prime is 2495963629. The reversal of 2495963621 is 1263695942.

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., 1412632225 + 1083331396 = 37585^2 + 32914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2495963621 - 2²² = 2491769317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2495963629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247981810 + 1247981811.

It is an arithmetic number, because the mean of its divisors is an integer number (1247981811).

Almost surely, 2^2495963621 is an apocalyptic number.

It is an amenable number.

2495963621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2495963621 is an equidigital number, since it uses as much as digits as its factorization.

2495963621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 2495963621 is about 49959.6199044789. The cubic root of 2495963621 is about 1356.4779869556.

The spelling of 2495963621 in words is "two billion, four hundred ninety-five million, nine hundred sixty-three thousand, six hundred twenty-one".