9972861534 has 32 divisors (see below), whose sum is σ = 22331105280. Its totient is φ = 3298908600.

The previous prime is 9972861497. The next prime is 9972861539. The reversal of 9972861534 is 4351682799.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972861539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697822 + ... + 711969.

It is an arithmetic number, because the mean of its divisors is an integer number (697847040).

Almost surely, 2^9972861534 is an apocalyptic number.

9972861534 is an abundant number, since it is smaller than the sum of its proper divisors (12358243746).

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

9972861534 is a wasteful number, since it uses less digits than its factorization.

9972861534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409933 (or 1409927 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 9972861534 is about 99864.2154828245. The cubic root of 9972861534 is about 2152.4839892458.

The spelling of 9972861534 in words is "nine billion, nine hundred seventy-two million, eight hundred sixty-one thousand, five hundred thirty-four".