31761371368 has 8 divisors (see below), whose sum is σ = 59552571330. Its totient is φ = 15880685680.

The previous prime is 31761371353. The next prime is 31761371407. The reversal of 31761371368 is 86317316713.

It can be written as a sum of positive squares in only one way, i.e., 24341616324 + 7419755044 = 156018^2 + 86138^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×31761371368² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985085703 + ... + 1985085718.

Almost surely, 2^31761371368 is an apocalyptic number.

It is an amenable number.

31761371368 is a deficient number, since it is larger than the sum of its proper divisors (27791199962).

31761371368 is a wasteful number, since it uses less digits than its factorization.

31761371368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970171427 (or 3970171423 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The spelling of 31761371368 in words is "thirty-one billion, seven hundred sixty-one million, three hundred seventy-one thousand, three hundred sixty-eight".