4255621762655 has 4 divisors (see below), whose sum is σ = 5106746115192. Its totient is φ = 3404497410120.

The previous prime is 4255621762633. The next prime is 4255621762661. The reversal of 4255621762655 is 5562671265524.

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

It is not a de Polignac number, because 4255621762655 - 2¹² = 4255621758559 is a prime.

It is a super-2 number, since 2×4255621762655² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4255621762655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425562176261 + ... + 425562176270.

It is an arithmetic number, because the mean of its divisors is an integer number (1276686528798).

Almost surely, 2^{4255621762655} is an apocalyptic number.

4255621762655 is a deficient number, since it is larger than the sum of its proper divisors (851124352537).

4255621762655 is an equidigital number, since it uses as much as digits as its factorization.

4255621762655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851124352536.

The product of its digits is 30240000, while the sum is 56.

The spelling of 4255621762655 in words is "four trillion, two hundred fifty-five billion, six hundred twenty-one million, seven hundred sixty-two thousand, six hundred fifty-five".