39964381243236 has 72 divisors (see below), whose sum is σ = 105516284196960. Its totient is φ = 13225622524992.

The previous prime is 39964381243231. The next prime is 39964381243243. The reversal of 39964381243236 is 63234218346993.

39964381243236 is a `hidden beast` number, since 3 + 9 + 9 + 6 + 4 + 381 + 243 + 2 + 3 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (39964381243231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147762801 + ... + 148033016.

It is an arithmetic number, because the mean of its divisors is an integer number (1465503947180).

Almost surely, 2^{39964381243236} is an apocalyptic number.

39964381243236 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

39964381243236 is an abundant number, since it is smaller than the sum of its proper divisors (65551902953724).

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

39964381243236 is a wasteful number, since it uses less digits than its factorization.

39964381243236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295795975 (or 295795961 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 63.

The spelling of 39964381243236 in words is "thirty-nine trillion, nine hundred sixty-four billion, three hundred eighty-one million, two hundred forty-three thousand, two hundred thirty-six".