12783147840 has 140 divisors (see below), whose sum is σ = 45471997956. Its totient is φ = 3408832512.

The previous prime is 12783147827. The next prime is 12783147847. The reversal of 12783147840 is 4874138721.

It can be written as a sum of positive squares in 2 ways, for example, as 2418278976 + 10364868864 = 49176^2 + 101808^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12783147847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 220669 + ... + 272508.

Almost surely, 2^12783147840 is an apocalyptic number.

12783147840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12783147840 is an abundant number, since it is smaller than the sum of its proper divisors (32688850116).

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

12783147840 is an equidigital number, since it uses as much as digits as its factorization.

12783147840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493206 (or 493187 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 12783147840 in words is "twelve billion, seven hundred eighty-three million, one hundred forty-seven thousand, eight hundred forty".