52722188642 has 18 divisors (see below), whose sum is σ = 79542322083. Its totient is φ = 26208962064.

The previous prime is 52722188639. The next prime is 52722188657. The reversal of 52722188642 is 24688122725.

It can be written as a sum of positive squares in 5 ways, for example, as 32054963521 + 20667225121 = 179039^2 + 143761^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=162361.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74360984 + ... + 74361692.

Almost surely, 2^52722188642 is an apocalyptic number.

52722188642 is a deficient number, since it is larger than the sum of its proper divisors (26820133441).

52722188642 is an frugal number, since it uses more digits than its factorization.

52722188642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 940 counting only the distinct ones).

The product of its digits is 860160, while the sum is 47.

The spelling of 52722188642 in words is "fifty-two billion, seven hundred twenty-two million, one hundred eighty-eight thousand, six hundred forty-two".