12000781611 has 32 divisors (see below), whose sum is σ = 21881771520. Its totient is φ = 6330081312.

The previous prime is 12000781609. The next prime is 12000781619. The reversal of 12000781611 is 11618700021.

It is not a de Polignac number, because 12000781611 - 2¹ = 12000781609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12000781619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2439705 + ... + 2444618.

It is an arithmetic number, because the mean of its divisors is an integer number (683805360).

Almost surely, 2^12000781611 is an apocalyptic number.

12000781611 is a deficient number, since it is larger than the sum of its proper divisors (9880989909).

12000781611 is a wasteful number, since it uses less digits than its factorization.

12000781611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884352 (or 4884346 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The spelling of 12000781611 in words is "twelve billion, seven hundred eighty-one thousand, six hundred eleven".