1636621050394 has 32 divisors (see below), whose sum is σ = 2752879675392. Its totient is φ = 723183480000.

The previous prime is 1636621050373. The next prime is 1636621050439. The reversal of 1636621050394 is 4930501266361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63504 + ... + 1810324.

It is an arithmetic number, because the mean of its divisors is an integer number (86027489856).

Almost surely, 2^{1636621050394} is an apocalyptic number.

1636621050394 is a deficient number, since it is larger than the sum of its proper divisors (1116258624998).

1636621050394 is a wasteful number, since it uses less digits than its factorization.

1636621050394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748022.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 1636621050394 in words is "one trillion, six hundred thirty-six billion, six hundred twenty-one million, fifty thousand, three hundred ninety-four".