1225888922478 has 16 divisors (see below), whose sum is σ = 2674666740096. Its totient is φ = 371481491640.

The previous prime is 1225888922459. The next prime is 1225888922527. The reversal of 1225888922478 is 8742298885221.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 18574074583 = 1225888922478 / (1 + 2 + 2 + 5 + 8 + 8 + 8 + 9 + 2 + 2 + 4 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9287037226 + ... + 9287037357.

It is an arithmetic number, because the mean of its divisors is an integer number (167166671256).

Almost surely, 2^{1225888922478} is an apocalyptic number.

1225888922478 is an abundant number, since it is smaller than the sum of its proper divisors (1448777817618).

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

1225888922478 is a wasteful number, since it uses less digits than its factorization.

1225888922478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18574074599.

The product of its digits is 82575360, while the sum is 66.

The spelling of 1225888922478 in words is "one trillion, two hundred twenty-five billion, eight hundred eighty-eight million, nine hundred twenty-two thousand, four hundred seventy-eight".