220545278857455 has 32 divisors (see below), whose sum is σ = 357489659692800. Its totient is φ = 116089909807872.

The previous prime is 220545278857433. The next prime is 220545278857487. The reversal of 220545278857455 is 554758872545022.

It is not a de Polignac number, because 220545278857455 - 2¹² = 220545278853359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220545278857455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150277485 + ... + 151737974.

It is an arithmetic number, because the mean of its divisors is an integer number (11171551865400).

Almost surely, 2^{220545278857455} is an apocalyptic number.

220545278857455 is a deficient number, since it is larger than the sum of its proper divisors (136944380835345).

220545278857455 is a wasteful number, since it uses less digits than its factorization.

220545278857455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302016103.

The product of its (nonzero) digits is 1254400000, while the sum is 69.

The spelling of 220545278857455 in words is "two hundred twenty trillion, five hundred forty-five billion, two hundred seventy-eight million, eight hundred fifty-seven thousand, four hundred fifty-five".