1801860138026 has 16 divisors (see below), whose sum is σ = 2910772972800. Its totient is φ = 831606091248.

The previous prime is 1801860138017. The next prime is 1801860138031. The reversal of 1801860138026 is 6208310681081.

It is a happy number.

It is a super-3 number, since 3×1801860138026³ (a number of 38 digits) contains 333 as substring.

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, 137135 + ... + 1903293.

It is an arithmetic number, because the mean of its divisors is an integer number (181923310800).

Almost surely, 2^{1801860138026} is an apocalyptic number.

1801860138026 is a deficient number, since it is larger than the sum of its proper divisors (1108912834774).

1801860138026 is a wasteful number, since it uses less digits than its factorization.

1801860138026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805413.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 1801860138026 in words is "one trillion, eight hundred one billion, eight hundred sixty million, one hundred thirty-eight thousand, twenty-six".