2555415621 has 80 divisors (see below), whose sum is σ = 4574845440. Its totient is φ = 1403218080.

The previous prime is 2555415613. The next prime is 2555415631. The reversal of 2555415621 is 1265145552.

2555415621 is a `hidden beast` number, since 2 + 5 + 55 + 41 + 562 + 1 = 666.

It is not a de Polignac number, because 2555415621 - 2³ = 2555415613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555415601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 386086 + ... + 392648.

It is an arithmetic number, because the mean of its divisors is an integer number (57185568).

Almost surely, 2^2555415621 is an apocalyptic number.

It is an amenable number.

2555415621 is a deficient number, since it is larger than the sum of its proper divisors (2019429819).

2555415621 is a wasteful number, since it uses less digits than its factorization.

2555415621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628 (or 6619 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 2555415621 is about 50551.1188896942. The cubic root of 2555415621 is about 1367.1636883958.

It can be divided in two parts, 255541 and 5621, that added together give a palindrome (261162).

The spelling of 2555415621 in words is "two billion, five hundred fifty-five million, four hundred fifteen thousand, six hundred twenty-one".