631090913280 has 448 divisors, whose sum is σ = 2152452538368. Its totient is φ = 157515776000.

The previous prime is 631090913269. The next prime is 631090913287. The reversal of 631090913280 is 82319090136.

It is not an unprimeable number, because it can be changed into a prime (631090913287) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 132830905 + ... + 132835655.

Almost surely, 2^631090913280 is an apocalyptic number.

631090913280 is a gapful number since it is divisible by the number (60) 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 631090913280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076226269184).

631090913280 is an abundant number, since it is smaller than the sum of its proper divisors (1521361625088).

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

631090913280 is a wasteful number, since it uses less digits than its factorization.

631090913280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855 (or 4831 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 631090913280 in words is "six hundred thirty-one billion, ninety million, nine hundred thirteen thousand, two hundred eighty".