11956901623 has 2 divisors, whose sum is σ = 11956901624. Its totient is φ = 11956901622.

The previous prime is 11956901617. The next prime is 11956901633. The reversal of 11956901623 is 32610965911.

It is a weak prime.

It is an emirp because it is prime and its reverse (32610965911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11956901623 - 2⁹ = 11956901111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11956901623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11956901633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978450811 + 5978450812.

It is an arithmetic number, because the mean of its divisors is an integer number (5978450812).

Almost surely, 2^11956901623 is an apocalyptic number.

11956901623 is a deficient number, since it is larger than the sum of its proper divisors (1).

11956901623 is an equidigital number, since it uses as much as digits as its factorization.

11956901623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 11956901623 in words is "eleven billion, nine hundred fifty-six million, nine hundred one thousand, six hundred twenty-three".