726645157 has 16 divisors (see below), whose sum is σ = 853552000. Its totient is φ = 618317280.

The previous prime is 726645151. The next prime is 726645181. The reversal of 726645157 is 751546627.

It is not a de Polignac number, because 726645157 - 2³ = 726645149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726645151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40057 + ... + 55297.

It is an arithmetic number, because the mean of its divisors is an integer number (53347000).

Almost surely, 2^726645157 is an apocalyptic number.

It is an amenable number.

726645157 is a deficient number, since it is larger than the sum of its proper divisors (126906843).

726645157 is a wasteful number, since it uses less digits than its factorization.

726645157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15401 (or 15387 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 726645157 is about 26956.3565230912. The cubic root of 726645157 is about 899.0298834867.

The spelling of 726645157 in words is "seven hundred twenty-six million, six hundred forty-five thousand, one hundred fifty-seven".