12001978762 has 4 divisors (see below), whose sum is σ = 18002968146. Its totient is φ = 6000989380.

The previous prime is 12001978739. The next prime is 12001978763. The reversal of 12001978762 is 26787910021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6306106921 + 5695871841 = 79411^2 + 75471^2 .

It is not an unprimeable number, because it can be changed into a prime (12001978763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000494689 + ... + 3000494692.

Almost surely, 2^12001978762 is an apocalyptic number.

12001978762 is a deficient number, since it is larger than the sum of its proper divisors (6000989384).

12001978762 is an equidigital number, since it uses as much as digits as its factorization.

12001978762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000989383.

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 12001978762 in words is "twelve billion, one million, nine hundred seventy-eight thousand, seven hundred sixty-two".