2504263661 has 2 divisors, whose sum is σ = 2504263662. Its totient is φ = 2504263660.

The previous prime is 2504263639. The next prime is 2504263687. The reversal of 2504263661 is 1663624052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2357102500 + 147161161 = 48550^2 + 12131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504263661 - 2²² = 2500069357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2504263261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252131830 + 1252131831.

It is an arithmetic number, because the mean of its divisors is an integer number (1252131831).

Almost surely, 2^2504263661 is an apocalyptic number.

It is an amenable number.

2504263661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2504263661 is an equidigital number, since it uses as much as digits as its factorization.

2504263661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 2504263661 is about 50042.6184466800. The cubic root of 2504263661 is about 1357.9799271935.

The spelling of 2504263661 in words is "two billion, five hundred four million, two hundred sixty-three thousand, six hundred sixty-one".