991542302331253 has 8 divisors (see below), whose sum is σ = 991609678327968. Its totient is φ = 991474928652624.

The previous prime is 991542302331233. The next prime is 991542302331289. The reversal of 991542302331253 is 352133203245199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 991542302331253 - 2⁵ = 991542302331221 is a prime.

It is a super-2 number, since 2×991542302331253² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 991542302331253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991542302331233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902056575 + ... + 903155107.

It is an arithmetic number, because the mean of its divisors is an integer number (123951209790996).

Almost surely, 2^{991542302331253} is an apocalyptic number.

It is an amenable number.

991542302331253 is a deficient number, since it is larger than the sum of its proper divisors (67375996715).

991542302331253 is a wasteful number, since it uses less digits than its factorization.

991542302331253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159043.

The product of its (nonzero) digits is 5248800, while the sum is 52.

The spelling of 991542302331253 in words is "nine hundred ninety-one trillion, five hundred forty-two billion, three hundred two million, three hundred thirty-one thousand, two hundred fifty-three".