1220773457893 has 4 divisors (see below), whose sum is σ = 1331752863168. Its totient is φ = 1109794052620.

The previous prime is 1220773457831. The next prime is 1220773457983. The reversal of 1220773457893 is 3987543770221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1220773457893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220773457593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55489702621 + ... + 55489702642.

It is an arithmetic number, because the mean of its divisors is an integer number (332938215792).

Almost surely, 2^{1220773457893} is an apocalyptic number.

It is an amenable number.

1220773457893 is a deficient number, since it is larger than the sum of its proper divisors (110979405275).

1220773457893 is a wasteful number, since it uses less digits than its factorization.

1220773457893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110979405274.

The product of its (nonzero) digits is 17781120, while the sum is 58.

The spelling of 1220773457893 in words is "one trillion, two hundred twenty billion, seven hundred seventy-three million, four hundred fifty-seven thousand, eight hundred ninety-three".