726243207534 has 36 divisors (see below), whose sum is σ = 1703878301736. Its totient is φ = 223459447536.

The previous prime is 726243207523. The next prime is 726243207587. The reversal of 726243207534 is 435702342627.

726243207534 is a `hidden beast` number, since 72 + 6 + 2 + 43 + 2 + 0 + 7 + 534 = 666.

It is a super-2 number, since 2×726243207534² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 726243207534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 119366322 + ... + 119372405.

It is an arithmetic number, because the mean of its divisors is an integer number (47329952826).

Almost surely, 2^726243207534 is an apocalyptic number.

726243207534 is an abundant number, since it is smaller than the sum of its proper divisors (977635094202).

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

726243207534 is a wasteful number, since it uses less digits than its factorization.

726243207534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238738761 (or 238738745 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 45.

The spelling of 726243207534 in words is "seven hundred twenty-six billion, two hundred forty-three million, two hundred seven thousand, five hundred thirty-four".