39975980544 has 320 divisors, whose sum is σ = 126164544000. Its totient is φ = 12617275392.

The previous prime is 39975980533. The next prime is 39975980549. The reversal of 39975980544 is 44508957993.

39975980544 is a `hidden beast` number, since 3 + 9 + 9 + 7 + 5 + 9 + 80 + 544 = 666.

It is a super-4 number, since 4×39975980544⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39975980549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21274197 + ... + 21276075.

It is an arithmetic number, because the mean of its divisors is an integer number (394264200).

Almost surely, 2^39975980544 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 39975980544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63082272000).

39975980544 is an abundant number, since it is smaller than the sum of its proper divisors (86188563456).

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

39975980544 is an frugal number, since it uses more digits than its factorization.

39975980544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 39975980544 in words is "thirty-nine billion, nine hundred seventy-five million, nine hundred eighty thousand, five hundred forty-four".