1805242155837 has 16 divisors (see below), whose sum is σ = 2458319016960. Its totient is φ = 1177832468912.

The previous prime is 1805242155797. The next prime is 1805242155853. The reversal of 1805242155837 is 7385512425081.

It is not a de Polignac number, because 1805242155837 - 2⁷ = 1805242155709 is a prime.

It is a super-2 number, since 2×1805242155837² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1805242155837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805242155887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2780614 + ... + 3367832.

It is an arithmetic number, because the mean of its divisors is an integer number (153644938560).

Almost surely, 2^{1805242155837} is an apocalyptic number.

It is an amenable number.

1805242155837 is a deficient number, since it is larger than the sum of its proper divisors (653076861123).

1805242155837 is a wasteful number, since it uses less digits than its factorization.

1805242155837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609072.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 1805242155837 in words is "one trillion, eight hundred five billion, two hundred forty-two million, one hundred fifty-five thousand, eight hundred thirty-seven".