39987265680 has 320 divisors, whose sum is σ = 141098112000. Its totient is φ = 10406043648.

The previous prime is 39987265657. The next prime is 39987265723. The reversal of 39987265680 is 8656278993.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15185644 + ... + 15188276.

It is an arithmetic number, because the mean of its divisors is an integer number (440931600).

Almost surely, 2^39987265680 is an apocalyptic number.

39987265680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39987265680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70549056000).

39987265680 is an abundant number, since it is smaller than the sum of its proper divisors (101110846320).

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

39987265680 is a wasteful number, since it uses less digits than its factorization.

39987265680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 39987265680 in words is "thirty-nine billion, nine hundred eighty-seven million, two hundred sixty-five thousand, six hundred eighty".