1816157012 has 6 divisors (see below), whose sum is σ = 3178274778. Its totient is φ = 908078504.

The previous prime is 1816157011. The next prime is 1816157029. The reversal of 1816157012 is 2107516181.

It can be written as a sum of positive squares in only one way, i.e., 1307834896 + 508322116 = 36164^2 + 22546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1816157012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816157011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227019623 + ... + 227019630.

It is an arithmetic number, because the mean of its divisors is an integer number (529712463).

Almost surely, 2^1816157012 is an apocalyptic number.

It is an amenable number.

1816157012 is a deficient number, since it is larger than the sum of its proper divisors (1362117766).

1816157012 is a wasteful number, since it uses less digits than its factorization.

1816157012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454039257 (or 454039255 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 1816157012 is about 42616.3937000774. The cubic root of 1816157012 is about 1220.0692005897.

The spelling of 1816157012 in words is "one billion, eight hundred sixteen million, one hundred fifty-seven thousand, twelve".