1861523112 has 32 divisors (see below), whose sum is σ = 4657913280. Its totient is φ = 619960320.

The previous prime is 1861523107. The next prime is 1861523117. The reversal of 1861523112 is 2113251681.

It is an interprime number because it is at equal distance from previous prime (1861523107) and next prime (1861523117).

It is a self number, because there is not a number n which added to its sum of digits gives 1861523112.

It is not an unprimeable number, because it can be changed into a prime (1861523117) 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 7 ways as a sum of consecutive naturals, for example, 5964 + ... + 61307.

It is an arithmetic number, because the mean of its divisors is an integer number (145559790).

Almost surely, 2^1861523112 is an apocalyptic number.

1861523112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1861523112 is an abundant number, since it is smaller than the sum of its proper divisors (2796390168).

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

1861523112 is a wasteful number, since it uses less digits than its factorization.

1861523112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68433 (or 68429 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 1861523112 is about 43145.3718491335. The cubic root of 1861523112 is about 1230.1445424689.

Adding to 1861523112 its reverse (2113251681), we get a palindrome (3974774793).

The spelling of 1861523112 in words is "one billion, eight hundred sixty-one million, five hundred twenty-three thousand, one hundred twelve".