722426901849 has 27 divisors (see below), whose sum is σ = 1047494817759. Its totient is φ = 479783727360.

The previous prime is 722426901841. The next prime is 722426901857. The reversal of 722426901849 is 948109624227.

It is a happy number.

The square root of 722426901849 is 849957.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (722426901841) and next prime (722426901857).

It can be written as a sum of positive squares in only one way, i.e., 441484500249 + 280942401600 = 664443^2 + 530040^2 .

It is not a de Polignac number, because 722426901849 - 2³ = 722426901841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722426901795 and 722426901804.

It is not an unprimeable number, because it can be changed into a prime (722426901841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1144891764 + ... + 1144892394.

Almost surely, 2^722426901849 is an apocalyptic number.

722426901849 is the 849957-th square number.

722426901849 is the 424979-th centered octagonal number.

It is an amenable number.

722426901849 is a deficient number, since it is larger than the sum of its proper divisors (325067915910).

722426901849 is an frugal number, since it uses more digits than its factorization.

722426901849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 722426901849 in words is "seven hundred twenty-two billion, four hundred twenty-six million, nine hundred one thousand, eight hundred forty-nine".