39691143780 has 96 divisors (see below), whose sum is σ = 112320964224. Its totient is φ = 10471716864.

The previous prime is 39691143749. The next prime is 39691143847. The reversal of 39691143780 is 8734119693.

39691143780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3974874 + ... + 3984846.

It is an arithmetic number, because the mean of its divisors is an integer number (1170010044).

Almost surely, 2^39691143780 is an apocalyptic number.

39691143780 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 39691143780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56160482112).

39691143780 is an abundant number, since it is smaller than the sum of its proper divisors (72629820444).

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

39691143780 is a wasteful number, since it uses less digits than its factorization.

39691143780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685 (or 10683 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 39691143780 in words is "thirty-nine billion, six hundred ninety-one million, one hundred forty-three thousand, seven hundred eighty".