31085661784 has 8 divisors (see below), whose sum is σ = 58285615860. Its totient is φ = 15542830888.

The previous prime is 31085661727. The next prime is 31085661791. The reversal of 31085661784 is 48716658013.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1942853854 + ... + 1942853869.

Almost surely, 2^31085661784 is an apocalyptic number.

It is an amenable number.

31085661784 is a deficient number, since it is larger than the sum of its proper divisors (27199954076).

31085661784 is a wasteful number, since it uses less digits than its factorization.

31085661784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885707729 (or 3885707725 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 31085661784 in words is "thirty-one billion, eighty-five million, six hundred sixty-one thousand, seven hundred eighty-four".