1228455556679 has 12 divisors (see below), whose sum is σ = 1330304189400. Its totient is φ = 1133888150304.

The previous prime is 1228455556649. The next prime is 1228455556681. The reversal of 1228455556679 is 9766555548221.

It is a happy number.

It is not a de Polignac number, because 1228455556679 - 2²⁰ = 1228454508103 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228455556619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2589917 + ... + 3027305.

It is an arithmetic number, because the mean of its divisors is an integer number (110858682450).

Almost surely, 2^{1228455556679} is an apocalyptic number.

1228455556679 is a deficient number, since it is larger than the sum of its proper divisors (101848632721).

1228455556679 is a wasteful number, since it uses less digits than its factorization.

1228455556679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454034 (or 454021 counting only the distinct ones).

The product of its digits is 181440000, while the sum is 65.

The spelling of 1228455556679 in words is "one trillion, two hundred twenty-eight billion, four hundred fifty-five million, five hundred fifty-six thousand, six hundred seventy-nine".