12826019745 has 72 divisors (see below), whose sum is σ = 28212537600. Its totient is φ = 5330283840.

The previous prime is 12826019741. The next prime is 12826019753. The reversal of 12826019745 is 54791062821.

It is not a de Polignac number, because 12826019745 - 2² = 12826019741 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12826019745.

It is not an unprimeable number, because it can be changed into a prime (12826019741) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 240145 + ... + 288654.

It is an arithmetic number, because the mean of its divisors is an integer number (391840800).

Almost surely, 2^12826019745 is an apocalyptic number.

12826019745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12826019745 is an abundant number, since it is smaller than the sum of its proper divisors (15386517855).

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

12826019745 is a wasteful number, since it uses less digits than its factorization.

12826019745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528835 (or 528825 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12826019745 in words is "twelve billion, eight hundred twenty-six million, nineteen thousand, seven hundred forty-five".