1225798426828 has 12 divisors (see below), whose sum is σ = 2145185603680. Its totient is φ = 612888254352.

The previous prime is 1225798426793. The next prime is 1225798426829. The reversal of 1225798426828 is 8286248975221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225798426828.

It is not an unprimeable number, because it can be changed into a prime (1225798426829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2485476 + ... + 2937547.

Almost surely, 2^{1225798426828} is an apocalyptic number.

It is an amenable number.

1225798426828 is a deficient number, since it is larger than the sum of its proper divisors (919387176852).

1225798426828 is a wasteful number, since it uses less digits than its factorization.

1225798426828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479536 (or 5479534 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 64.

The spelling of 1225798426828 in words is "one trillion, two hundred twenty-five billion, seven hundred ninety-eight million, four hundred twenty-six thousand, eight hundred twenty-eight".