991145300333564 has 12 divisors (see below), whose sum is σ = 1734518863972944. Its totient is φ = 495568482055584.

The previous prime is 991145300333549. The next prime is 991145300333567. The reversal of 991145300333564 is 465333003541199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991145300333567) 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, 1041492737 + ... + 1042443960.

It is an arithmetic number, because the mean of its divisors is an integer number (144543238664412).

Almost surely, 2^{991145300333564} is an apocalyptic number.

It is an amenable number.

991145300333564 is a deficient number, since it is larger than the sum of its proper divisors (743373563639380).

991145300333564 is a wasteful number, since it uses less digits than its factorization.

991145300333564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084055604 (or 2084055602 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 56.

The spelling of 991145300333564 in words is "nine hundred ninety-one trillion, one hundred forty-five billion, three hundred million, three hundred thirty-three thousand, five hundred sixty-four".