1228395122895 has 16 divisors (see below), whose sum is σ = 1965481418880. Its totient is φ = 655127658144.

The previous prime is 1228395122879. The next prime is 1228395122909. The reversal of 1228395122895 is 5982215938221.

It is a happy number.

It is not a de Polignac number, because 1228395122895 - 2⁴ = 1228395122879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394009 + ... + 1616178.

It is an arithmetic number, because the mean of its divisors is an integer number (122842588680).

Almost surely, 2^{1228395122895} is an apocalyptic number.

1228395122895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1228395122895 is a deficient number, since it is larger than the sum of its proper divisors (737086295985).

1228395122895 is a wasteful number, since it uses less digits than its factorization.

1228395122895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050934.

The product of its digits is 6220800, while the sum is 57.

The spelling of 1228395122895 in words is "one trillion, two hundred twenty-eight billion, three hundred ninety-five million, one hundred twenty-two thousand, eight hundred ninety-five".