11993655394 has 32 divisors (see below), whose sum is σ = 21774744576. Its totient is φ = 4843262160.

The previous prime is 11993655383. The next prime is 11993655407. The reversal of 11993655394 is 49355639911.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256392 + ... + 299539.

It is an arithmetic number, because the mean of its divisors is an integer number (680460768).

Almost surely, 2^11993655394 is an apocalyptic number.

11993655394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11993655394 is a deficient number, since it is larger than the sum of its proper divisors (9781089182).

11993655394 is a wasteful number, since it uses less digits than its factorization.

11993655394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556030.

The product of its digits is 3936600, while the sum is 55.

The spelling of 11993655394 in words is "eleven billion, nine hundred ninety-three million, six hundred fifty-five thousand, three hundred ninety-four".