991253300141572 has 24 divisors (see below), whose sum is σ = 1918621252460696. Its totient is φ = 445136617110528.

The previous prime is 991253300141567. The next prime is 991253300141641. The reversal of 991253300141572 is 275141003352199.

It can be written as a sum of positive squares in 4 ways, for example, as 144702037574656 + 846551262566916 = 12029216^2 + 29095554^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 257602207053 + ... + 257602210900.

Almost surely, 2^{991253300141572} is an apocalyptic number.

It is an amenable number.

991253300141572 is a deficient number, since it is larger than the sum of its proper divisors (927367952319124).

991253300141572 is a wasteful number, since it uses less digits than its factorization.

991253300141572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515204418007 (or 515204418005 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 991253300141572 in words is "nine hundred ninety-one trillion, two hundred fifty-three billion, three hundred million, one hundred forty-one thousand, five hundred seventy-two".