991448537363 has 8 divisors (see below), whose sum is σ = 1021711834080. Its totient is φ = 961474841920.

The previous prime is 991448537353. The next prime is 991448537399. The reversal of 991448537363 is 363735844199.

991448537363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 991448537363 - 2¹² = 991448533267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 991448537296 and 991448537305.

It is not an unprimeable number, because it can be changed into a prime (991448537333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72393368 + ... + 72407061.

It is an arithmetic number, because the mean of its divisors is an integer number (127713979260).

Almost surely, 2^991448537363 is an apocalyptic number.

991448537363 is a deficient number, since it is larger than the sum of its proper divisors (30263296717).

991448537363 is a wasteful number, since it uses less digits than its factorization.

991448537363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144800637.

The product of its digits is 58786560, while the sum is 62.

The spelling of 991448537363 in words is "nine hundred ninety-one billion, four hundred forty-eight million, five hundred thirty-seven thousand, three hundred sixty-three".