11778972146247 has 16 divisors (see below), whose sum is σ = 16088492222208. Its totient is φ = 7661053417920.

The previous prime is 11778972146233. The next prime is 11778972146287. The reversal of 11778972146247 is 74264127987711.

11778972146247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11778972146247 - 2⁴ = 11778972146231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778972146287) 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, 16579708 + ... + 17275550.

It is an arithmetic number, because the mean of its divisors is an integer number (1005530763888).

Almost surely, 2^{11778972146247} is an apocalyptic number.

11778972146247 is a deficient number, since it is larger than the sum of its proper divisors (4309520075961).

11778972146247 is a wasteful number, since it uses less digits than its factorization.

11778972146247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833510.

The product of its digits is 66382848, while the sum is 66.

The spelling of 11778972146247 in words is "eleven trillion, seven hundred seventy-eight billion, nine hundred seventy-two million, one hundred forty-six thousand, two hundred forty-seven".