1816699456 has 56 divisors (see below), whose sum is σ = 4235281344. Its totient is φ = 762247680.

The previous prime is 1816699453. The next prime is 1816699481. The reversal of 1816699456 is 6549966181.

It is a junction number, because it is equal to n+sod(n) for n = 1816699397 and 1816699406.

It is not an unprimeable number, because it can be changed into a prime (1816699453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90100 + ... + 108403.

It is an arithmetic number, because the mean of its divisors is an integer number (75630024).

Almost surely, 2^1816699456 is an apocalyptic number.

1816699456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1816699456 is an abundant number, since it is smaller than the sum of its proper divisors (2418581888).

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

1816699456 is a wasteful number, since it uses less digits than its factorization.

1816699456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198539 (or 198529 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The square root of 1816699456 is about 42622.7574893976. The cubic root of 1816699456 is about 1220.1906572945.

The spelling of 1816699456 in words is "one billion, eight hundred sixteen million, six hundred ninety-nine thousand, four hundred fifty-six".