11881621747 has 8 divisors (see below), whose sum is σ = 12554530560. Its totient is φ = 11213469000.

The previous prime is 11881621723. The next prime is 11881621771. The reversal of 11881621747 is 74712618811.

It is an interprime number because it is at equal distance from previous prime (11881621723) and next prime (11881621771).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11881621747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11881621697 and 11881621706.

It is not an unprimeable number, because it can be changed into a prime (11881621447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183879 + ... + 1193872.

It is an arithmetic number, because the mean of its divisors is an integer number (1569316320).

Almost surely, 2^11881621747 is an apocalyptic number.

11881621747 is a deficient number, since it is larger than the sum of its proper divisors (672908813).

11881621747 is a wasteful number, since it uses less digits than its factorization.

11881621747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378033.

The product of its digits is 150528, while the sum is 46.

The spelling of 11881621747 in words is "eleven billion, eight hundred eighty-one million, six hundred twenty-one thousand, seven hundred forty-seven".