2500816621 has 8 divisors (see below), whose sum is σ = 2510711424. Its totient is φ = 2490934320.

The previous prime is 2500816609. The next prime is 2500816649. The reversal of 2500816621 is 1266180052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2500816621 - 2¹¹ = 2500814573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500816601) 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 7 ways as a sum of consecutive naturals, for example, 647131 + ... + 650983.

It is an arithmetic number, because the mean of its divisors is an integer number (313838928).

Almost surely, 2^2500816621 is an apocalyptic number.

It is an amenable number.

2500816621 is a deficient number, since it is larger than the sum of its proper divisors (9894803).

2500816621 is a wasteful number, since it uses less digits than its factorization.

2500816621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 2500816621 is about 50008.1655432390. The cubic root of 2500816621 is about 1357.3565689053.

Adding to 2500816621 its reverse (1266180052), we get a palindrome (3766996673).

The spelling of 2500816621 in words is "two billion, five hundred million, eight hundred sixteen thousand, six hundred twenty-one".