1812669756 has 12 divisors (see below), whose sum is σ = 4229562792. Its totient is φ = 604223248.

The previous prime is 1812669751. The next prime is 1812669757. The reversal of 1812669756 is 6579662181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1812669699 and 1812669708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812669751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75527895 + ... + 75527918.

It is an arithmetic number, because the mean of its divisors is an integer number (352463566).

Almost surely, 2^1812669756 is an apocalyptic number.

It is an amenable number.

1812669756 is an abundant number, since it is smaller than the sum of its proper divisors (2416893036).

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

1812669756 is a wasteful number, since it uses less digits than its factorization.

1812669756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151055820 (or 151055818 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 1812669756 is about 42575.4595512485. The cubic root of 1812669756 is about 1219.2878034403.

The spelling of 1812669756 in words is "one billion, eight hundred twelve million, six hundred sixty-nine thousand, seven hundred fifty-six".