11767620647 has 4 divisors (see below), whose sum is σ = 11769638400. Its totient is φ = 11765602896.

The previous prime is 11767620619. The next prime is 11767620661. The reversal of 11767620647 is 74602676711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74602676711 = 19 ⋅3926456669.

It is a cyclic number.

It is not a de Polignac number, because 11767620647 - 2⁸ = 11767620391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11767620047) 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 in 3 ways as a sum of consecutive naturals, for example, 1000103 + ... + 1011800.

It is an arithmetic number, because the mean of its divisors is an integer number (2942409600).

Almost surely, 2^11767620647 is an apocalyptic number.

11767620647 is a deficient number, since it is larger than the sum of its proper divisors (2017753).

11767620647 is an equidigital number, since it uses as much as digits as its factorization.

11767620647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017752.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 11767620647 in words is "eleven billion, seven hundred sixty-seven million, six hundred twenty thousand, six hundred forty-seven".