4255621728634 has 4 divisors (see below), whose sum is σ = 6383432592954. Its totient is φ = 2127810864316.

The previous prime is 4255621728607. The next prime is 4255621728637. The reversal of 4255621728634 is 4368271265524.

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

It can be written as a sum of positive squares in only one way, i.e., 4078772042409 + 176849686225 = 2019597^2 + 420535^2 .

It is a super-2 number, since 2×4255621728634² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4255621728637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063905432157 + ... + 1063905432160.

Almost surely, 2^{4255621728634} is an apocalyptic number.

4255621728634 is a deficient number, since it is larger than the sum of its proper divisors (2127810864320).

4255621728634 is a wasteful number, since it uses less digits than its factorization.

4255621728634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127810864319.

The product of its digits is 19353600, while the sum is 55.

The spelling of 4255621728634 in words is "four trillion, two hundred fifty-five billion, six hundred twenty-one million, seven hundred twenty-eight thousand, six hundred thirty-four".