31743381977 has 16 divisors (see below), whose sum is σ = 32715752832. Its totient is φ = 30787827840.

The previous prime is 31743381913. The next prime is 31743381979. The reversal of 31743381977 is 77918334713.

It is a cyclic number.

It is not a de Polignac number, because 31743381977 - 2⁶ = 31743381913 is a prime.

It is a super-4 number, since 4×31743381977⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31743381979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2049938 + ... + 2065364.

It is an arithmetic number, because the mean of its divisors is an integer number (2044734552).

Almost surely, 2^31743381977 is an apocalyptic number.

It is an amenable number.

31743381977 is a deficient number, since it is larger than the sum of its proper divisors (972370855).

31743381977 is a wasteful number, since it uses less digits than its factorization.

31743381977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15968.

The product of its digits is 2667168, while the sum is 53.

The spelling of 31743381977 in words is "thirty-one billion, seven hundred forty-three million, three hundred eighty-one thousand, nine hundred seventy-seven".