2172722021508 has 24 divisors (see below), whose sum is σ = 5098006982880. Its totient is φ = 720194635840.

The previous prime is 2172722021473. The next prime is 2172722021531. The reversal of 2172722021508 is 8051202272712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505752513 + ... + 505756808.

It is an arithmetic number, because the mean of its divisors is an integer number (212416957620).

Almost surely, 2^{2172722021508} is an apocalyptic number.

It is an amenable number.

2172722021508 is an abundant number, since it is smaller than the sum of its proper divisors (2925284961372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172722021508 is a wasteful number, since it uses less digits than its factorization.

2172722021508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011509507 (or 1011509505 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The spelling of 2172722021508 in words is "two trillion, one hundred seventy-two billion, seven hundred twenty-two million, twenty-one thousand, five hundred eight".