91000091746 has 8 divisors (see below), whose sum is σ = 136502781120. Its totient is φ = 45499164708.

The previous prime is 91000091723. The next prime is 91000091807. The reversal of 91000091746 is 64719000019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302886 + ... + 523201.

It is an arithmetic number, because the mean of its divisors is an integer number (17062847640).

Almost surely, 2^91000091746 is an apocalyptic number.

91000091746 is a deficient number, since it is larger than the sum of its proper divisors (45502689374).

91000091746 is a wasteful number, since it uses less digits than its factorization.

91000091746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881168.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 91000091746 in words is "ninety-one billion, ninety-one thousand, seven hundred forty-six".