1698040522379 has 4 divisors (see below), whose sum is σ = 1702520840760. Its totient is φ = 1693560204000.

The previous prime is 1698040522357. The next prime is 1698040522397. The reversal of 1698040522379 is 9732250408961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1698040522379 - 2³² = 1693745555083 is a prime.

It is a super-2 number, since 2×1698040522379² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1698040522679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240158622 + ... + 2240159379.

It is an arithmetic number, because the mean of its divisors is an integer number (425630210190).

It is a 1-persistent number, because it is pandigital, but 2⋅1698040522379 = 3396081044758 is not.

Almost surely, 2^{1698040522379} is an apocalyptic number.

1698040522379 is a deficient number, since it is larger than the sum of its proper divisors (4480318381).

1698040522379 is an equidigital number, since it uses as much as digits as its factorization.

1698040522379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480318380.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 1698040522379 in words is "one trillion, six hundred ninety-eight billion, forty million, five hundred twenty-two thousand, three hundred seventy-nine".