91426640918 has 8 divisors (see below), whose sum is σ = 137154546480. Its totient is φ = 45708458760.

The previous prime is 91426640909. The next prime is 91426640927. The reversal of 91426640918 is 81904662419.

It is an interprime number because it is at equal distance from previous prime (91426640909) and next prime (91426640927).

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407298 + ... + 2444981.

It is an arithmetic number, because the mean of its divisors is an integer number (17144318310).

Almost surely, 2^91426640918 is an apocalyptic number.

91426640918 is a deficient number, since it is larger than the sum of its proper divisors (45727905562).

91426640918 is a wasteful number, since it uses less digits than its factorization.

91426640918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861702.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 91426640918 in words is "ninety-one billion, four hundred twenty-six million, six hundred forty thousand, nine hundred eighteen".