991150572076 has 24 divisors (see below), whose sum is σ = 2098907094816. Its totient is φ = 399791827200.

The previous prime is 991150572053. The next prime is 991150572119. The reversal of 991150572076 is 670275051199.

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, 1041124075 + ... + 1041125026.

It is an arithmetic number, because the mean of its divisors is an integer number (87454462284).

Almost surely, 2^991150572076 is an apocalyptic number.

It is an amenable number.

991150572076 is an abundant number, since it is smaller than the sum of its proper divisors (1107756522740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991150572076 is a wasteful number, since it uses less digits than its factorization.

991150572076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082249129 (or 2082249127 counting only the distinct ones).

The product of its (nonzero) digits is 1190700, while the sum is 52.

The spelling of 991150572076 in words is "nine hundred ninety-one billion, one hundred fifty million, five hundred seventy-two thousand, seventy-six".