8972981550 has 144 divisors (see below), whose sum is σ = 26923849680. Its totient is φ = 2208695040.

The previous prime is 8972981539. The next prime is 8972981561. The reversal of 8972981550 is 551892798.

8972981550 is a `hidden beast` number, since 8 + 9 + 7 + 2 + 9 + 81 + 550 = 666.

8972981550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8972981539) and next prime (8972981561).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129546 + ... + 186354.

Almost surely, 2^8972981550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8972981550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13461924840).

8972981550 is an abundant number, since it is smaller than the sum of its proper divisors (17950868130).

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

8972981550 is a wasteful number, since it uses less digits than its factorization.

8972981550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56849 (or 56832 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 8972981550 is about 94725.8230368045. The cubic root of 8972981550 is about 2078.0002314298. Note that the first 3 decimals are identical.

The spelling of 8972981550 in words is "eight billion, nine hundred seventy-two million, nine hundred eighty-one thousand, five hundred fifty".