91709918340 has 48 divisors (see below), whose sum is σ = 256836085632. Its totient is φ = 24451376896.

The previous prime is 91709918269. The next prime is 91709918359. The reversal of 91709918340 is 4381990719.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183937 + ... + 466103.

It is an arithmetic number, because the mean of its divisors is an integer number (5350751784).

Almost surely, 2^91709918340 is an apocalyptic number.

It is an amenable number.

91709918340 is an abundant number, since it is smaller than the sum of its proper divisors (165126167292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91709918340 is a wasteful number, since it uses less digits than its factorization.

91709918340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287596 (or 287594 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 91709918340 in words is "ninety-one billion, seven hundred nine million, nine hundred eighteen thousand, three hundred forty".