91914191010 has 48 divisors (see below), whose sum is σ = 240297253560. Its totient is φ = 24375029760.

The previous prime is 91914191003. The next prime is 91914191051. The reversal of 91914191010 is 1019141919.

It can be written as a sum of positive squares in 4 ways, for example, as 58907658681 + 33006532329 = 242709^2 + 181677^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2804895 + ... + 2837474.

Almost surely, 2^91914191010 is an apocalyptic number.

91914191010 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91914191010 is an abundant number, since it is smaller than the sum of its proper divisors (148383062550).

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

91914191010 is a wasteful number, since it uses less digits than its factorization.

91914191010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642563 (or 5642560 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 91914191010 in words is "ninety-one billion, nine hundred fourteen million, one hundred ninety-one thousand, ten".