1631451454442 has 16 divisors (see below), whose sum is σ = 2499272851752. Its totient is φ = 798433621440.

The previous prime is 1631451454441. The next prime is 1631451454447. The reversal of 1631451454442 is 2444541541361.

It can be written as a sum of positive squares in 4 ways, for example, as 922270201801 + 709181252641 = 960349^2 + 842129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1631451454393 and 1631451454402.

It is not an unprimeable number, because it can be changed into a prime (1631451454441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18234533 + ... + 18323784.

Almost surely, 2^{1631451454442} is an apocalyptic number.

1631451454442 is a deficient number, since it is larger than the sum of its proper divisors (867821397310).

1631451454442 is a wasteful number, since it uses less digits than its factorization.

1631451454442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36558793.

The product of its digits is 921600, while the sum is 44.

The spelling of 1631451454442 in words is "one trillion, six hundred thirty-one billion, four hundred fifty-one million, four hundred fifty-four thousand, four hundred forty-two".