39664061642 has 24 divisors (see below), whose sum is σ = 61629571584. Its totient is φ = 19143924912.

The previous prime is 39664061587. The next prime is 39664061651. The reversal of 39664061642 is 24616046693.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290693 + ... + 404759.

It is an arithmetic number, because the mean of its divisors is an integer number (2567898816).

Almost surely, 2^39664061642 is an apocalyptic number.

39664061642 is a deficient number, since it is larger than the sum of its proper divisors (21965509942).

39664061642 is a wasteful number, since it uses less digits than its factorization.

39664061642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114270 (or 114233 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 39664061642 in words is "thirty-nine billion, six hundred sixty-four million, sixty-one thousand, six hundred forty-two".