726761406437 has 64 divisors (see below), whose sum is σ = 882149253120. Its totient is φ = 591692640000.

The previous prime is 726761406421. The next prime is 726761406443. The reversal of 726761406437 is 734604167627.

It is a happy number.

It is not a de Polignac number, because 726761406437 - 2⁴ = 726761406421 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726761406407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31765112 + ... + 31787982.

It is an arithmetic number, because the mean of its divisors is an integer number (13783582080).

Almost surely, 2^726761406437 is an apocalyptic number.

It is an amenable number.

726761406437 is a deficient number, since it is larger than the sum of its proper divisors (155387846683).

726761406437 is a wasteful number, since it uses less digits than its factorization.

726761406437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23066.

The product of its (nonzero) digits is 7112448, while the sum is 53.

The spelling of 726761406437 in words is "seven hundred twenty-six billion, seven hundred sixty-one million, four hundred six thousand, four hundred thirty-seven".