39977166391 has 32 divisors (see below), whose sum is σ = 46296792000. Its totient is φ = 34264000512.

The previous prime is 39977166389. The next prime is 39977166401. The reversal of 39977166391 is 19366177993.

It is not a de Polignac number, because 39977166391 - 2¹ = 39977166389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39977166301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2135725 + ... + 2154361.

It is an arithmetic number, because the mean of its divisors is an integer number (1446774750).

Almost surely, 2^39977166391 is an apocalyptic number.

39977166391 is a deficient number, since it is larger than the sum of its proper divisors (6319625609).

39977166391 is a wasteful number, since it uses less digits than its factorization.

39977166391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931.

The product of its digits is 11573604, while the sum is 61.

The spelling of 39977166391 in words is "thirty-nine billion, nine hundred seventy-seven million, one hundred sixty-six thousand, three hundred ninety-one".