1697109442090 has 8 divisors (see below), whose sum is σ = 3054796995780. Its totient is φ = 678843776832.

The previous prime is 1697109442073. The next prime is 1697109442097. The reversal of 1697109442090 is 902449017961.

It can be written as a sum of positive squares in 2 ways, for example, as 1581474759489 + 115634682601 = 1257567^2 + 340051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1697109442097) 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, 84855472095 + ... + 84855472114.

Almost surely, 2^{1697109442090} is an apocalyptic number.

1697109442090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1697109442090 is a deficient number, since it is larger than the sum of its proper divisors (1357687553690).

1697109442090 is a wasteful number, since it uses less digits than its factorization.

1697109442090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169710944216.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 1697109442090 in words is "one trillion, six hundred ninety-seven billion, one hundred nine million, four hundred forty-two thousand, ninety".