91056013726 has 4 divisors (see below), whose sum is σ = 136584020592. Its totient is φ = 45528006862.

The previous prime is 91056013721. The next prime is 91056013729. The reversal of 91056013726 is 62731065019.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91056013721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22764003430 + ... + 22764003433.

It is an arithmetic number, because the mean of its divisors is an integer number (34146005148).

Almost surely, 2^91056013726 is an apocalyptic number.

91056013726 is a deficient number, since it is larger than the sum of its proper divisors (45528006866).

91056013726 is a wasteful number, since it uses less digits than its factorization.

91056013726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45528006865.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 91056013726 in words is "ninety-one billion, fifty-six million, thirteen thousand, seven hundred twenty-six".