9981093150972 has 36 divisors (see below), whose sum is σ = 25232119073616. Its totient is φ = 3326749695360.

The previous prime is 9981093150947. The next prime is 9981093150979. The reversal of 9981093150972 is 2790513901899.

9981093150972 is a `hidden beast` number, since 9 + 98 + 1 + 0 + 9 + 31 + 509 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981093150979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11291293 + ... + 12143124.

Almost surely, 2^{9981093150972} is an apocalyptic number.

It is an amenable number.

9981093150972 is an abundant number, since it is smaller than the sum of its proper divisors (15251025922644).

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

9981093150972 is a wasteful number, since it uses less digits than its factorization.

9981093150972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23446258 (or 23446253 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The spelling of 9981093150972 in words is "nine trillion, nine hundred eighty-one billion, ninety-three million, one hundred fifty thousand, nine hundred seventy-two".