91986988426 has 8 divisors (see below), whose sum is σ = 137981778624. Its totient is φ = 45993062220.

The previous prime is 91986988391. The next prime is 91986988453. The reversal of 91986988426 is 62488968919.

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, 259711 + ... + 501421.

It is an arithmetic number, because the mean of its divisors is an integer number (17247722328).

Almost surely, 2^91986988426 is an apocalyptic number.

91986988426 is a deficient number, since it is larger than the sum of its proper divisors (45994790198).

91986988426 is a wasteful number, since it uses less digits than its factorization.

91986988426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431996.

The product of its digits is 107495424, while the sum is 70.

The spelling of 91986988426 in words is "ninety-one billion, nine hundred eighty-six million, nine hundred eighty-eight thousand, four hundred twenty-six".