31660080000 has 640 divisors, whose sum is σ = 113566147200. Its totient is φ = 7787520000.

The previous prime is 31660079977. The next prime is 31660080017. The reversal of 31660080000 is 8006613.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 in 79 ways as a sum of consecutive naturals, for example, 241679935 + ... + 241680065.

It is an arithmetic number, because the mean of its divisors is an integer number (177447105).

Almost surely, 2^31660080000 is an apocalyptic number.

31660080000 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 31660080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56783073600).

31660080000 is an abundant number, since it is smaller than the sum of its proper divisors (81906067200).

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

31660080000 is a wasteful number, since it uses less digits than its factorization.

31660080000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31660080000 its reverse (8006613), we get a palindrome (31668086613).

The spelling of 31660080000 in words is "thirty-one billion, six hundred sixty million, eighty thousand".