1631906622720 has 864 divisors, whose sum is σ = 6448868794368. Its totient is φ = 377395200000.

The previous prime is 1631906622691. The next prime is 1631906622817. The reversal of 1631906622720 is 272266091361.

1631906622720 is a `hidden beast` number, since 1 + 6 + 3 + 19 + 0 + 6 + 622 + 7 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278907795 + ... + 278913645.

It is an arithmetic number, because the mean of its divisors is an integer number (7463968512).

Almost surely, 2^{1631906622720} is an apocalyptic number.

1631906622720 is a gapful number since it is divisible by the number (10) 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 1631906622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3224434397184).

1631906622720 is an abundant number, since it is smaller than the sum of its proper divisors (4816962171648).

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

1631906622720 is a wasteful number, since it uses less digits than its factorization.

1631906622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991 (or 5974 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

It can be divided in two parts, 1631906 and 622720, that added together give a triangular number (2254626 = T₂₁₂₃).

The spelling of 1631906622720 in words is "one trillion, six hundred thirty-one billion, nine hundred six million, six hundred twenty-two thousand, seven hundred twenty".