1812776064 has 64 divisors (see below), whose sum is σ = 5252942880. Its totient is φ = 549324800.

The previous prime is 1812775963. The next prime is 1812776081. The reversal of 1812776064 is 4606772181.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1812776064² = 6572314116422664192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 210357 + ... + 218804.

Almost surely, 2^1812776064 is an apocalyptic number.

It is an amenable number.

1812776064 is an abundant number, since it is smaller than the sum of its proper divisors (3440166816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1812776064 is a wasteful number, since it uses less digits than its factorization.

1812776064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429189 (or 429177 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1812776064 is about 42576.7079986229. The cubic root of 1812776064 is about 1219.3116389116.

The spelling of 1812776064 in words is "one billion, eight hundred twelve million, seven hundred seventy-six thousand, sixty-four".