4278538414655 has 4 divisors (see below), whose sum is σ = 5134246097592. Its totient is φ = 3422830731720.

The previous prime is 4278538414651. The next prime is 4278538414697. The reversal of 4278538414655 is 5564148358724.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4278538414655 - 2² = 4278538414651 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 (4278538414651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427853841461 + ... + 427853841470.

It is an arithmetic number, because the mean of its divisors is an integer number (1283561524398).

Almost surely, 2^{4278538414655} is an apocalyptic number.

4278538414655 is a deficient number, since it is larger than the sum of its proper divisors (855707682937).

4278538414655 is an equidigital number, since it uses as much as digits as its factorization.

4278538414655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855707682936.

The product of its digits is 129024000, while the sum is 62.

The spelling of 4278538414655 in words is "four trillion, two hundred seventy-eight billion, five hundred thirty-eight million, four hundred fourteen thousand, six hundred fifty-five".