1274778774721 has 8 divisors (see below), whose sum is σ = 1275437469888. Its totient is φ = 1274120250000.

The previous prime is 1274778774697. The next prime is 1274778774739.

1274778774721 is nontrivially palindromic in base 10.

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-1274778774721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1274778774781) 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, 16544916 + ... + 16621786.

It is an arithmetic number, because the mean of its divisors is an integer number (159429683736).

Almost surely, 2^{1274778774721} is an apocalyptic number.

It is an amenable number.

1274778774721 is a deficient number, since it is larger than the sum of its proper divisors (658695167).

1274778774721 is an equidigital number, since it uses as much as digits as its factorization.

1274778774721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85223.

The product of its digits is 60236288, while the sum is 64.

The spelling of 1274778774721 in words is "one trillion, two hundred seventy-four billion, seven hundred seventy-eight million, seven hundred seventy-four thousand, seven hundred twenty-one".