726631655 has 4 divisors (see below), whose sum is σ = 871957992. Its totient is φ = 581305320.

The previous prime is 726631621. The next prime is 726631657. The reversal of 726631655 is 556136627.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 726631655 - 2²⁸ = 458196199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726631657) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 72663161 + ... + 72663170.

It is an arithmetic number, because the mean of its divisors is an integer number (217989498).

Almost surely, 2^726631655 is an apocalyptic number.

726631655 is a deficient number, since it is larger than the sum of its proper divisors (145326337).

726631655 is a wasteful number, since it uses less digits than its factorization.

726631655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145326336.

The product of its digits is 226800, while the sum is 41.

The square root of 726631655 is about 26956.1060800702. The cubic root of 726631655 is about 899.0243150757.

The spelling of 726631655 in words is "seven hundred twenty-six million, six hundred thirty-one thousand, six hundred fifty-five".