991834296475 has 48 divisors (see below), whose sum is σ = 1385581317120. Its totient is φ = 697752720000.

The previous prime is 991834296407. The next prime is 991834296493. The reversal of 991834296475 is 574692438199.

It is not a de Polignac number, because 991834296475 - 2¹⁷ = 991834165403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 991834296475.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19915105 + ... + 19964845.

It is an arithmetic number, because the mean of its divisors is an integer number (28866277440).

Almost surely, 2^991834296475 is an apocalyptic number.

991834296475 is a deficient number, since it is larger than the sum of its proper divisors (393747020645).

991834296475 is a wasteful number, since it uses less digits than its factorization.

991834296475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52132 (or 52127 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 67.

The spelling of 991834296475 in words is "nine hundred ninety-one billion, eight hundred thirty-four million, two hundred ninety-six thousand, four hundred seventy-five".