31676451840 has 704 divisors, whose sum is σ = 126349355520. Its totient is φ = 7458324480.

The previous prime is 31676451827. The next prime is 31676451841. The reversal of 31676451840 is 4815467613.

31676451840 is a `hidden beast` number, since 31 + 6 + 7 + 64 + 518 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (31676451841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56263399 + ... + 56263961.

Almost surely, 2^31676451840 is an apocalyptic number.

31676451840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31676451840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63174677760).

31676451840 is an abundant number, since it is smaller than the sum of its proper divisors (94672903680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31676451840 is a wasteful number, since it uses less digits than its factorization.

31676451840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 31676451840 in words is "thirty-one billion, six hundred seventy-six million, four hundred fifty-one thousand, eight hundred forty".