39545289568 has 72 divisors (see below), whose sum is σ = 86300160912. Its totient is φ = 17800341504.

The previous prime is 39545289559. The next prime is 39545289583. The reversal of 39545289568 is 86598254593.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119746 + ... + 305662.

It is an arithmetic number, because the mean of its divisors is an integer number (1198613346).

Almost surely, 2^39545289568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39545289568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43150080456).

39545289568 is an abundant number, since it is smaller than the sum of its proper divisors (46754871344).

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

39545289568 is a wasteful number, since it uses less digits than its factorization.

39545289568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185984 (or 185959 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 64.

The spelling of 39545289568 in words is "thirty-nine billion, five hundred forty-five million, two hundred eighty-nine thousand, five hundred sixty-eight".