991253300141573 has 4 divisors (see below), whose sum is σ = 1132860914447520. Its totient is φ = 849645685835628.

The previous prime is 991253300141567. The next prime is 991253300141641. The reversal of 991253300141573 is 375141003352199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 991253300141573 - 2²⁰ = 991253299092997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991253300141473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70803807152963 + ... + 70803807152976.

It is an arithmetic number, because the mean of its divisors is an integer number (283215228611880).

Almost surely, 2^{991253300141573} is an apocalyptic number.

It is an amenable number.

991253300141573 is a deficient number, since it is larger than the sum of its proper divisors (141607614305947).

991253300141573 is a wasteful number, since it uses less digits than its factorization.

991253300141573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141607614305946.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 991253300141573 in words is "nine hundred ninety-one trillion, two hundred fifty-three billion, three hundred million, one hundred forty-one thousand, five hundred seventy-three".