1816115040 has 96 divisors (see below), whose sum is σ = 6356417760. Its totient is φ = 484296192.

The previous prime is 1816115039. The next prime is 1816115047. The reversal of 1816115040 is 405116181.

1816115040 is a `hidden beast` number, since 1 + 8 + 1 + 611 + 5 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1816114995 and 1816115013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816115047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205879 + ... + 214518.

It is an arithmetic number, because the mean of its divisors is an integer number (66212685).

Almost surely, 2^1816115040 is an apocalyptic number.

1816115040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816115040 is an abundant number, since it is smaller than the sum of its proper divisors (4540302720).

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

1816115040 is a wasteful number, since it uses less digits than its factorization.

1816115040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420421 (or 420407 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 1816115040 is about 42615.9012576292. The cubic root of 1816115040 is about 1220.0598017806.

The spelling of 1816115040 in words is "one billion, eight hundred sixteen million, one hundred fifteen thousand, forty".