1636660401042 has 16 divisors (see below), whose sum is σ = 3279828404160. Its totient is φ = 544468866672.

The previous prime is 1636660401031. The next prime is 1636660401067. The reversal of 1636660401042 is 2401040666361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271146817 + ... + 271152852.

It is an arithmetic number, because the mean of its divisors is an integer number (204989275260).

Almost surely, 2^{1636660401042} is an apocalyptic number.

1636660401042 is an abundant number, since it is smaller than the sum of its proper divisors (1643168003118).

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

1636660401042 is a wasteful number, since it uses less digits than its factorization.

1636660401042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542300177.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 1636660401042 in words is "one trillion, six hundred thirty-six billion, six hundred sixty million, four hundred one thousand, forty-two".