1806151061 has 16 divisors (see below), whose sum is σ = 2214172800. Its totient is φ = 1449750720.

The previous prime is 1806151051. The next prime is 1806151063. The reversal of 1806151061 is 1601516081.

It is not a de Polignac number, because 1806151061 - 2²⁶ = 1739042197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806151063) 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 15 ways as a sum of consecutive naturals, for example, 271286 + ... + 277863.

It is an arithmetic number, because the mean of its divisors is an integer number (138385800).

Almost surely, 2^1806151061 is an apocalyptic number.

1806151061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1806151061 is a deficient number, since it is larger than the sum of its proper divisors (408021739).

1806151061 is a wasteful number, since it uses less digits than its factorization.

1806151061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549196.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1806151061 is about 42498.8359958246. The cubic root of 1806151061 is about 1217.8244532166.

The spelling of 1806151061 in words is "one billion, eight hundred six million, one hundred fifty-one thousand, sixty-one".