31128734516 has 12 divisors (see below), whose sum is σ = 59427584160. Its totient is φ = 14149424760.

The previous prime is 31128734501. The next prime is 31128734521. The reversal of 31128734516 is 61543782113.

It is a super-2 number, since 2×31128734516² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353735576 + ... + 353735663.

It is an arithmetic number, because the mean of its divisors is an integer number (4952298680).

Almost surely, 2^31128734516 is an apocalyptic number.

It is an amenable number.

31128734516 is a deficient number, since it is larger than the sum of its proper divisors (28298849644).

31128734516 is a wasteful number, since it uses less digits than its factorization.

31128734516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707471254 (or 707471252 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The spelling of 31128734516 in words is "thirty-one billion, one hundred twenty-eight million, seven hundred thirty-four thousand, five hundred sixteen".