2655151621 has 4 divisors (see below), whose sum is σ = 2678648652. Its totient is φ = 2631654592.

The previous prime is 2655151567. The next prime is 2655151651. The reversal of 2655151621 is 1261515562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14630625 + 2640520996 = 3825^2 + 51386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2655151621 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 (2655151651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11748346 + ... + 11748571.

It is an arithmetic number, because the mean of its divisors is an integer number (669662163).

Almost surely, 2^2655151621 is an apocalyptic number.

It is an amenable number.

2655151621 is a deficient number, since it is larger than the sum of its proper divisors (23497031).

2655151621 is a wasteful number, since it uses less digits than its factorization.

2655151621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23497030.

The product of its digits is 18000, while the sum is 34.

The square root of 2655151621 is about 51528.1633769340. The cubic root of 2655151621 is about 1384.7236470695.

The spelling of 2655151621 in words is "two billion, six hundred fifty-five million, one hundred fifty-one thousand, six hundred twenty-one".