726420155 has 24 divisors (see below), whose sum is σ = 916617408. Its totient is φ = 552600576.

The previous prime is 726420143. The next prime is 726420193. The reversal of 726420155 is 551024627.

It is not a de Polignac number, because 726420155 - 2²⁰ = 725371579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509774 + ... + 511196.

It is an arithmetic number, because the mean of its divisors is an integer number (38192392).

Almost surely, 2^726420155 is an apocalyptic number.

726420155 is a deficient number, since it is larger than the sum of its proper divisors (190197253).

726420155 is a wasteful number, since it uses less digits than its factorization.

726420155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 726420155 is about 26952.1827501967. The cubic root of 726420155 is about 898.9370805543.

The spelling of 726420155 in words is "seven hundred twenty-six million, four hundred twenty thousand, one hundred fifty-five".