1802772081 has 24 divisors (see below), whose sum is σ = 2888889120. Its totient is φ = 1074067200.

The previous prime is 1802772073. The next prime is 1802772107.

It is a happy number.

1802772081 is a `hidden beast` number, since 180 + 277 + 208 + 1 = 666.

1802772081 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1802772081 - 2³ = 1802772073 is a prime.

It is a super-2 number, since 2×1802772081² = 6499974352066141122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1802772001) 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 23 ways as a sum of consecutive naturals, for example, 148480 + ... + 160161.

It is an arithmetic number, because the mean of its divisors is an integer number (120370380).

Almost surely, 2^1802772081 is an apocalyptic number.

1802772081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1802772081 is a deficient number, since it is larger than the sum of its proper divisors (1086117039).

1802772081 is a wasteful number, since it uses less digits than its factorization.

1802772081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308717 (or 308714 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 1802772081 is about 42459.0635907105. The cubic root of 1802772081 is about 1217.0645364759.

The spelling of 1802772081 in words is "one billion, eight hundred two million, seven hundred seventy-two thousand, eighty-one".