75257256722 has 18 divisors (see below), whose sum is σ = 116930210943. Its totient is φ = 36325657984.

The previous prime is 75257256703. The next prime is 75257256749. The reversal of 75257256722 is 22765275257.

It can be written as a sum of positive squares in 5 ways, for example, as 64146199441 + 11111057281 = 253271^2 + 105409^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=193981.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 11247554 + ... + 11254242.

Almost surely, 2^75257256722 is an apocalyptic number.

75257256722 is a deficient number, since it is larger than the sum of its proper divisors (41672954221).

75257256722 is an frugal number, since it uses more digits than its factorization.

75257256722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13438 (or 6720 counting only the distinct ones).

The product of its digits is 4116000, while the sum is 50.

Multiplying 75257256722 by its sum of digits (50), we get a square (3762862836100 = 1939810²).

The spelling of 75257256722 in words is "seventy-five billion, two hundred fifty-seven million, two hundred fifty-six thousand, seven hundred twenty-two".