1228156747475 has 48 divisors (see below), whose sum is σ = 1786056518400. Its totient is φ = 820220688000.

The previous prime is 1228156747471. The next prime is 1228156747529. The reversal of 1228156747475 is 5747476518221.

It is not a de Polignac number, because 1228156747475 - 2² = 1228156747471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228156747471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2392400 + ... + 2860050.

It is an arithmetic number, because the mean of its divisors is an integer number (37209510800).

Almost surely, 2^{1228156747475} is an apocalyptic number.

1228156747475 is a deficient number, since it is larger than the sum of its proper divisors (557899770925).

1228156747475 is a wasteful number, since it uses less digits than its factorization.

1228156747475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468060 (or 468055 counting only the distinct ones).

The product of its digits is 26342400, while the sum is 59.

The spelling of 1228156747475 in words is "one trillion, two hundred twenty-eight billion, one hundred fifty-six million, seven hundred forty-seven thousand, four hundred seventy-five".