2501263638649 has 4 divisors (see below), whose sum is σ = 2501267887440. Its totient is φ = 2501259389860.

The previous prime is 2501263638617. The next prime is 2501263638661. The reversal of 2501263638649 is 9468363621052.

2501263638649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2501263638649 - 2⁵ = 2501263638617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2501263638649.

It is not an unprimeable number, because it can be changed into a prime (2501263638449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065367 + ... + 2477404.

It is an arithmetic number, because the mean of its divisors is an integer number (625316971860).

Almost surely, 2^{2501263638649} is an apocalyptic number.

It is an amenable number.

2501263638649 is a deficient number, since it is larger than the sum of its proper divisors (4248791).

2501263638649 is an equidigital number, since it uses as much as digits as its factorization.

2501263638649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248790.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 2501263638649 in words is "two trillion, five hundred one billion, two hundred sixty-three million, six hundred thirty-eight thousand, six hundred forty-nine".