4278265620721 has 8 divisors (see below), whose sum is σ = 4466907897984. Its totient is φ = 4089842570880.

The previous prime is 4278265620689. The next prime is 4278265620731. The reversal of 4278265620721 is 1270265628724.

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

It is a cyclic number.

It is not a de Polignac number, because 4278265620721 - 2⁵ = 4278265620689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4278265620731) 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, 54766965 + ... + 54845026.

It is an arithmetic number, because the mean of its divisors is an integer number (558363487248).

Almost surely, 2^{4278265620721} is an apocalyptic number.

It is an amenable number.

4278265620721 is a deficient number, since it is larger than the sum of its proper divisors (188642277263).

4278265620721 is a wasteful number, since it uses less digits than its factorization.

4278265620721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109613711.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 4278265620721 in words is "four trillion, two hundred seventy-eight billion, two hundred sixty-five million, six hundred twenty thousand, seven hundred twenty-one".