21622252315755 has 144 divisors (see below), whose sum is σ = 43072043376384. Its totient is φ = 9069272259840.

The previous prime is 21622252315747. The next prime is 21622252315771. The reversal of 21622252315755 is 55751325222612.

It is not a de Polignac number, because 21622252315755 - 2³ = 21622252315747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 494868460 + ... + 494912150.

It is an arithmetic number, because the mean of its divisors is an integer number (299111412336).

Almost surely, 2^{21622252315755} is an apocalyptic number.

21622252315755 is a deficient number, since it is larger than the sum of its proper divisors (21449791060629).

21622252315755 is a wasteful number, since it uses less digits than its factorization.

21622252315755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44066 (or 43886 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 48.

The spelling of 21622252315755 in words is "twenty-one trillion, six hundred twenty-two billion, two hundred fifty-two million, three hundred fifteen thousand, seven hundred fifty-five".