12997151784 has 80 divisors (see below), whose sum is σ = 36449788320. Its totient is φ = 4326942240.

The previous prime is 12997151747. The next prime is 12997151807. The reversal of 12997151784 is 48715179921.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12997151784.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 521119 + ... + 545489.

It is an arithmetic number, because the mean of its divisors is an integer number (455622354).

Almost surely, 2^12997151784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12997151784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18224894160).

12997151784 is an abundant number, since it is smaller than the sum of its proper divisors (23452636536).

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

12997151784 is a wasteful number, since it uses less digits than its factorization.

12997151784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25212 (or 25199 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The spelling of 12997151784 in words is "twelve billion, nine hundred ninety-seven million, one hundred fifty-one thousand, seven hundred eighty-four".