1812771534 has 16 divisors (see below), whose sum is σ = 4143477888. Its totient is φ = 517934712.

The previous prime is 1812771517. The next prime is 1812771547. The reversal of 1812771534 is 4351772181.

It is a happy number.

It is a super-2 number, since 2×1812771534² = 6572281268961426312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1812771492 and 1812771501.

It is a congruent number.

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, 21580572 + ... + 21580655.

It is an arithmetic number, because the mean of its divisors is an integer number (258967368).

Almost surely, 2^1812771534 is an apocalyptic number.

1812771534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1812771534 is an abundant number, since it is smaller than the sum of its proper divisors (2330706354).

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

1812771534 is a wasteful number, since it uses less digits than its factorization.

1812771534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43161239.

The product of its digits is 47040, while the sum is 39.

The square root of 1812771534 is about 42576.6548004890. The cubic root of 1812771534 is about 1219.3106232527.

The spelling of 1812771534 in words is "one billion, eight hundred twelve million, seven hundred seventy-one thousand, five hundred thirty-four".