31478062472 has 8 divisors (see below), whose sum is σ = 59021367150. Its totient is φ = 15739031232.

The previous prime is 31478062457. The next prime is 31478062481. The reversal of 31478062472 is 27426087413.

It can be written as a sum of positive squares in only one way, i.e., 27730908676 + 3747153796 = 166526^2 + 61214^2 .

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

It is a super-2 number, since 2×31478062472² (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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967378897 + ... + 1967378912.

Almost surely, 2^31478062472 is an apocalyptic number.

It is an amenable number.

31478062472 is a deficient number, since it is larger than the sum of its proper divisors (27543304678).

31478062472 is a wasteful number, since it uses less digits than its factorization.

31478062472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934757815 (or 3934757811 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 31478062472 in words is "thirty-one billion, four hundred seventy-eight million, sixty-two thousand, four hundred seventy-two".