1809425686690 has 32 divisors (see below), whose sum is σ = 3399903694080. Its totient is φ = 692031029184.

The previous prime is 1809425686619. The next prime is 1809425686697. The reversal of 1809425686690 is 966865249081.

It is a super-2 number, since 2×1809425686690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1809425686697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950230 + ... + 2126449.

It is an arithmetic number, because the mean of its divisors is an integer number (106246990440).

Almost surely, 2^{1809425686690} is an apocalyptic number.

1809425686690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1809425686690 is a deficient number, since it is larger than the sum of its proper divisors (1590478007390).

1809425686690 is a wasteful number, since it uses less digits than its factorization.

1809425686690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079266.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 1809425686690 in words is "one trillion, eight hundred nine billion, four hundred twenty-five million, six hundred eighty-six thousand, six hundred ninety".