4255621728515 has 8 divisors (see below), whose sum is σ = 5231300856768. Its totient is φ = 3321460861120.

The previous prime is 4255621728503. The next prime is 4255621728541. The reversal of 4255621728515 is 5158271265524.

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

It is not a de Polignac number, because 4255621728515 - 2⁶ = 4255621728451 is a prime.

It is a super-2 number, since 2×4255621728515² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10379564987 + ... + 10379565396.

It is an arithmetic number, because the mean of its divisors is an integer number (653912607096).

Almost surely, 2^{4255621728515} is an apocalyptic number.

4255621728515 is a deficient number, since it is larger than the sum of its proper divisors (975679128253).

4255621728515 is a wasteful number, since it uses less digits than its factorization.

4255621728515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759130429.

The product of its digits is 6720000, while the sum is 53.

The spelling of 4255621728515 in words is "four trillion, two hundred fifty-five billion, six hundred twenty-one million, seven hundred twenty-eight thousand, five hundred fifteen".