11685373690638 has 16 divisors (see below), whose sum is σ = 23371192500480. Its totient is φ = 3895050377016.

The previous prime is 11685373690607. The next prime is 11685373690681. The reversal of 11685373690638 is 83609637358611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18204870 + ... + 18835817.

It is an arithmetic number, because the mean of its divisors is an integer number (1460699531280).

Almost surely, 2^{11685373690638} is an apocalyptic number.

11685373690638 is an abundant number, since it is smaller than the sum of its proper divisors (11685818809842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11685373690638 is a wasteful number, since it uses less digits than its factorization.

11685373690638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37093271.

The product of its (nonzero) digits is 117573120, while the sum is 66.

The spelling of 11685373690638 in words is "eleven trillion, six hundred eighty-five billion, three hundred seventy-three million, six hundred ninety thousand, six hundred thirty-eight".