11988974506 has 32 divisors (see below), whose sum is σ = 19391783040. Its totient is φ = 5547237696.

The previous prime is 11988974489. The next prime is 11988974507. The reversal of 11988974506 is 60547988911.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (11988974507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102091 + ... + 185473.

It is an arithmetic number, because the mean of its divisors is an integer number (605993220).

Almost surely, 2^11988974506 is an apocalyptic number.

11988974506 is a deficient number, since it is larger than the sum of its proper divisors (7402808534).

11988974506 is a wasteful number, since it uses less digits than its factorization.

11988974506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83518.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 11988974506 in words is "eleven billion, nine hundred eighty-eight million, nine hundred seventy-four thousand, five hundred six".