1801966537 has 8 divisors (see below), whose sum is σ = 2085459200. Its totient is φ = 1524991104.

The previous prime is 1801966501. The next prime is 1801966571. The reversal of 1801966537 is 7356691081.

It is a happy number.

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

It is not a de Polignac number, because 1801966537 - 2⁷ = 1801966409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1801966597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628712 + ... + 1629817.

It is an arithmetic number, because the mean of its divisors is an integer number (260682400).

Almost surely, 2^1801966537 is an apocalyptic number.

It is an amenable number.

1801966537 is a deficient number, since it is larger than the sum of its proper divisors (283492663).

1801966537 is an equidigital number, since it uses as much as digits as its factorization.

1801966537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258615.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1801966537 is about 42449.5764054248. The cubic root of 1801966537 is about 1216.8832332656.

The spelling of 1801966537 in words is "one billion, eight hundred one million, nine hundred sixty-six thousand, five hundred thirty-seven".