1228401117778 has 8 divisors (see below), whose sum is σ = 1844108304768. Its totient is φ = 613698349524.

The previous prime is 1228401117719. The next prime is 1228401117799. The reversal of 1228401117778 is 8777111048221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251101626 + ... + 251106517.

It is an arithmetic number, because the mean of its divisors is an integer number (230513538096).

Almost surely, 2^{1228401117778} is an apocalyptic number.

1228401117778 is a deficient number, since it is larger than the sum of its proper divisors (615707186990).

1228401117778 is a wasteful number, since it uses less digits than its factorization.

1228401117778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502209368.

The product of its (nonzero) digits is 351232, while the sum is 49.

The spelling of 1228401117778 in words is "one trillion, two hundred twenty-eight billion, four hundred one million, one hundred seventeen thousand, seven hundred seventy-eight".