991949824048 has 80 divisors (see below), whose sum is σ = 2030620228416. Its totient is φ = 468866810880.

The previous prime is 991949824039. The next prime is 991949824153. The reversal of 991949824048 is 840428949199.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3078258 + ... + 3385198.

Almost surely, 2^991949824048 is an apocalyptic number.

It is an amenable number.

991949824048 is an abundant number, since it is smaller than the sum of its proper divisors (1038670404368).

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

991949824048 is a wasteful number, since it uses less digits than its factorization.

991949824048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307142 (or 307136 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 67.

The spelling of 991949824048 in words is "nine hundred ninety-one billion, nine hundred forty-nine million, eight hundred twenty-four thousand, forty-eight".