1228401837993 has 16 divisors (see below), whose sum is σ = 1824782616576. Its totient is φ = 728645834640.

The previous prime is 1228401837983. The next prime is 1228401838019. The reversal of 1228401837993 is 3997381048221.

It is a happy number.

It is not a de Polignac number, because 1228401837993 - 2⁸ = 1228401837737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228401837953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396001621 + ... + 396004722.

It is an arithmetic number, because the mean of its divisors is an integer number (114048913536).

Almost surely, 2^{1228401837993} is an apocalyptic number.

It is an amenable number.

1228401837993 is a deficient number, since it is larger than the sum of its proper divisors (596380778583).

1228401837993 is a wasteful number, since it uses less digits than its factorization.

1228401837993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792006404.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 1228401837993 in words is "one trillion, two hundred twenty-eight billion, four hundred one million, eight hundred thirty-seven thousand, nine hundred ninety-three".