31609316487 has 32 divisors (see below), whose sum is σ = 49596019200. Its totient is φ = 17528946048.

The previous prime is 31609316443. The next prime is 31609316489. The reversal of 31609316487 is 78461390613.

It is a happy number.

It is not a de Polignac number, because 31609316487 - 2⁷ = 31609316359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31609316489) 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, 249964 + ... + 354542.

It is an arithmetic number, because the mean of its divisors is an integer number (1549875600).

Almost surely, 2^31609316487 is an apocalyptic number.

31609316487 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

31609316487 is a deficient number, since it is larger than the sum of its proper divisors (17986702713).

31609316487 is a wasteful number, since it uses less digits than its factorization.

31609316487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105015.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 31609316487 in words is "thirty-one billion, six hundred nine million, three hundred sixteen thousand, four hundred eighty-seven".