991546041910 has 16 divisors (see below), whose sum is σ = 1809920663712. Its totient is φ = 391032241600.

The previous prime is 991546041821. The next prime is 991546041943. The reversal of 991546041910 is 19140645199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698271151 + ... + 698272570.

It is an arithmetic number, because the mean of its divisors is an integer number (113120041482).

Almost surely, 2^991546041910 is an apocalyptic number.

991546041910 is a deficient number, since it is larger than the sum of its proper divisors (818374621802).

991546041910 is a wasteful number, since it uses less digits than its factorization.

991546041910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396543799.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 991546041910 in words is "nine hundred ninety-one billion, five hundred forty-six million, forty-one thousand, nine hundred ten".