39961595520000 has 1980 divisors, whose sum is σ = 181152278315008. Its totient is φ = 8302694400000.

The previous prime is 39961595519969. The next prime is 39961595520013. The reversal of 39961595520000 is 2559516993.

It is a happy number.

39961595520000 is a `hidden beast` number, since 3 + 9 + 9 + 61 + 59 + 5 + 520 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1980).

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 4878715905 + ... + 4878724095.

Almost surely, 2^{39961595520000} is an apocalyptic number.

39961595520000 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 39961595520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90576139157504).

39961595520000 is an abundant number, since it is smaller than the sum of its proper divisors (141190682795008).

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

39961595520000 is a wasteful number, since it uses less digits than its factorization.

39961595520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8266 (or 8219 counting only the distinct ones).

The product of its (nonzero) digits is 3280500, while the sum is 54.

It can be divided in two parts, 3996159 and 5520000, that added together give a palindrome (9516159).

The spelling of 39961595520000 in words is "thirty-nine trillion, nine hundred sixty-one billion, five hundred ninety-five million, five hundred twenty thousand".