39661377980512 has 24 divisors (see below), whose sum is σ = 79183103226192. Its totient is φ = 19551383510400.

The previous prime is 39661377980461. The next prime is 39661377980557. The reversal of 39661377980512 is 21508977316693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8728293939 + ... + 8728298482.

It is an arithmetic number, because the mean of its divisors is an integer number (3299295967758).

Almost surely, 2^{39661377980512} is an apocalyptic number.

39661377980512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39661377980512 is a deficient number, since it is larger than the sum of its proper divisors (39521725245680).

39661377980512 is a wasteful number, since it uses less digits than its factorization.

39661377980512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456592502 (or 17456592494 counting only the distinct ones).

The product of its (nonzero) digits is 102876480, while the sum is 67.

The spelling of 39661377980512 in words is "thirty-nine trillion, six hundred sixty-one billion, three hundred seventy-seven million, nine hundred eighty thousand, five hundred twelve".