31497666480 has 1200 divisors, whose sum is σ = 140394228480. Its totient is φ = 6495261696.

The previous prime is 31497666479. The next prime is 31497666491. The reversal of 31497666480 is 8466679413.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 239 ways as a sum of consecutive naturals, for example, 138756127 + ... + 138756353.

Almost surely, 2^31497666480 is an apocalyptic number.

31497666480 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 31497666480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70197114240).

31497666480 is an abundant number, since it is smaller than the sum of its proper divisors (108896562000).

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

31497666480 is a wasteful number, since it uses less digits than its factorization.

31497666480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 31497666480 in words is "thirty-one billion, four hundred ninety-seven million, six hundred sixty-six thousand, four hundred eighty".