39977172705 has 8 divisors (see below), whose sum is σ = 63963476352. Its totient is φ = 21321158768.

The previous prime is 39977172637. The next prime is 39977172709. The reversal of 39977172705 is 50727177993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39977172705 - 2⁷ = 39977172577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39977172709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332572409 + ... + 1332572438.

It is an arithmetic number, because the mean of its divisors is an integer number (7995434544).

Almost surely, 2^39977172705 is an apocalyptic number.

It is an amenable number.

39977172705 is a deficient number, since it is larger than the sum of its proper divisors (23986303647).

39977172705 is a wasteful number, since it uses less digits than its factorization.

39977172705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665144855.

The product of its (nonzero) digits is 5834430, while the sum is 57.

The spelling of 39977172705 in words is "thirty-nine billion, nine hundred seventy-seven million, one hundred seventy-two thousand, seven hundred five".