2155614425621 has 8 divisors (see below), whose sum is σ = 2156735185920. Its totient is φ = 2154493800208.

The previous prime is 2155614425597. The next prime is 2155614425681. The reversal of 2155614425621 is 1265244165512.

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 2155614425621 - 2¹⁸ = 2155614163477 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 (2155614425681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51355775 + ... + 51397731.

It is an arithmetic number, because the mean of its divisors is an integer number (269591898240).

Almost surely, 2^{2155614425621} is an apocalyptic number.

It is an amenable number.

2155614425621 is a deficient number, since it is larger than the sum of its proper divisors (1120760299).

2155614425621 is a wasteful number, since it uses less digits than its factorization.

2155614425621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67443.

The product of its digits is 576000, while the sum is 44.

The spelling of 2155614425621 in words is "two trillion, one hundred fifty-five billion, six hundred fourteen million, four hundred twenty-five thousand, six hundred twenty-one".