2501621689 has 16 divisors (see below), whose sum is σ = 3108993408. Its totient is φ = 1963567872.

The previous prime is 2501621687. The next prime is 2501621711. The reversal of 2501621689 is 9861261052.

It is not a de Polignac number, because 2501621689 - 2¹ = 2501621687 is a prime.

It is a super-2 number, since 2×2501621689² = 12516222149750425442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501621687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279679 + ... + 288484.

It is an arithmetic number, because the mean of its divisors is an integer number (194312088).

Almost surely, 2^2501621689 is an apocalyptic number.

It is an amenable number.

2501621689 is a deficient number, since it is larger than the sum of its proper divisors (607371719).

2501621689 is a wasteful number, since it uses less digits than its factorization.

2501621689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568224.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2501621689 is about 50016.2142609774. The cubic root of 2501621689 is about 1357.5022076123.

The spelling of 2501621689 in words is "two billion, five hundred one million, six hundred twenty-one thousand, six hundred eighty-nine".