4278561455537 has 4 divisors (see below), whose sum is σ = 4278904934436. Its totient is φ = 4278217976640.

The previous prime is 4278561455533. The next prime is 4278561455561. The reversal of 4278561455537 is 7355541658724.

4278561455537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2015218733056 + 2263342722481 = 1419584^2 + 1504441^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278561455537 - 2² = 4278561455533 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 4278561455537.

It is not an unprimeable number, because it can be changed into a prime (4278561455533) 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, 171720764 + ... + 171745677.

It is an arithmetic number, because the mean of its divisors is an integer number (1069726233609).

Almost surely, 2^{4278561455537} is an apocalyptic number.

It is an amenable number.

4278561455537 is a deficient number, since it is larger than the sum of its proper divisors (343478899).

4278561455537 is a wasteful number, since it uses less digits than its factorization.

4278561455537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343478898.

The product of its digits is 141120000, while the sum is 62.

The spelling of 4278561455537 in words is "four trillion, two hundred seventy-eight billion, five hundred sixty-one million, four hundred fifty-five thousand, five hundred thirty-seven".