905909148722 has 6 divisors (see below), whose sum is σ = 1358865742143. Its totient is φ = 452953901342.

The previous prime is 905909148707. The next prime is 905909148743. The reversal of 905909148722 is 227841909509.

It can be written as a sum of positive squares in only one way, i.e., 452954574361 + 452954574361 = 673019^2 + 673019^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=673019.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1009529 + ... + 1682547.

Almost surely, 2^905909148722 is an apocalyptic number.

905909148722 is a deficient number, since it is larger than the sum of its proper divisors (452956593421).

905909148722 is an frugal number, since it uses more digits than its factorization.

905909148722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346040 (or 673021 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 905909148722 in words is "nine hundred five billion, nine hundred nine million, one hundred forty-eight thousand, seven hundred twenty-two".