1698400105642 has 32 divisors (see below), whose sum is σ = 2770761277440. Its totient is φ = 778443914160.

The previous prime is 1698400105637. The next prime is 1698400105657. The reversal of 1698400105642 is 2465010048961.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 1698400105592 and 1698400105601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5634792 + ... + 5928547.

It is an arithmetic number, because the mean of its divisors is an integer number (86586289920).

Almost surely, 2^{1698400105642} is an apocalyptic number.

1698400105642 is a deficient number, since it is larger than the sum of its proper divisors (1072361171798).

1698400105642 is a wasteful number, since it uses less digits than its factorization.

1698400105642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563498.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 1698400105642 in words is "one trillion, six hundred ninety-eight billion, four hundred million, one hundred five thousand, six hundred forty-two".