1220773457894 has 8 divisors (see below), whose sum is σ = 1927537038840. Its totient is φ = 578261111616.

The previous prime is 1220773457831. The next prime is 1220773457983. The reversal of 1220773457894 is 4987543770221.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 16062808619 + ... + 16062808694.

It is an arithmetic number, because the mean of its divisors is an integer number (240942129855).

Almost surely, 2^{1220773457894} is an apocalyptic number.

1220773457894 is a deficient number, since it is larger than the sum of its proper divisors (706763580946).

1220773457894 is a wasteful number, since it uses less digits than its factorization.

1220773457894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32125617334.

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 1220773457894 in words is "one trillion, two hundred twenty billion, seven hundred seventy-three million, four hundred fifty-seven thousand, eight hundred ninety-four".