1220717733457 has 8 divisors (see below), whose sum is σ = 1249122892160. Its totient is φ = 1192313319120.

The previous prime is 1220717733427. The next prime is 1220717733461. The reversal of 1220717733457 is 7543377170221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220717733457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220717733457.

It is not an unprimeable number, because it can be changed into a prime (1220717733427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473607 + ... + 4738627.

It is an arithmetic number, because the mean of its divisors is an integer number (156140361520).

Almost surely, 2^{1220717733457} is an apocalyptic number.

It is an amenable number.

1220717733457 is a deficient number, since it is larger than the sum of its proper divisors (28405158703).

1220717733457 is a wasteful number, since it uses less digits than its factorization.

1220717733457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372183.

The product of its (nonzero) digits is 1728720, while the sum is 49.

The spelling of 1220717733457 in words is "one trillion, two hundred twenty billion, seven hundred seventeen million, seven hundred thirty-three thousand, four hundred fifty-seven".