91461880390 has 8 divisors (see below), whose sum is σ = 164631384720. Its totient is φ = 36584752152.

The previous prime is 91461880369. The next prime is 91461880427. The reversal of 91461880390 is 9308816419.

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

It is a congruent number.

It is an unprimeable number.

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, 4573094010 + ... + 4573094029.

It is an arithmetic number, because the mean of its divisors is an integer number (20578923090).

Almost surely, 2^91461880390 is an apocalyptic number.

91461880390 is a deficient number, since it is larger than the sum of its proper divisors (73169504330).

91461880390 is a wasteful number, since it uses less digits than its factorization.

91461880390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146188046.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 91461880390 in words is "ninety-one billion, four hundred sixty-one million, eight hundred eighty thousand, three hundred ninety".