11621385375487 has 4 divisors (see below), whose sum is σ = 11840656797720. Its totient is φ = 11402113953256.

The previous prime is 11621385375451. The next prime is 11621385375517. The reversal of 11621385375487 is 78457358312611.

11621385375487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11621385375487 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 (11621385375407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109635711037 + ... + 109635711142.

It is an arithmetic number, because the mean of its divisors is an integer number (2960164199430).

Almost surely, 2^{11621385375487} is an apocalyptic number.

11621385375487 is a deficient number, since it is larger than the sum of its proper divisors (219271422233).

11621385375487 is an equidigital number, since it uses as much as digits as its factorization.

11621385375487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219271422232.

The product of its digits is 33868800, while the sum is 61.

The spelling of 11621385375487 in words is "eleven trillion, six hundred twenty-one billion, three hundred eighty-five million, three hundred seventy-five thousand, four hundred eighty-seven".