2778002555505 has 16 divisors (see below), whose sum is σ = 4462099052544. Its totient is φ = 1475836375040.

The previous prime is 2778002555473. The next prime is 2778002555509. The reversal of 2778002555505 is 5055552008772.

It is not a de Polignac number, because 2778002555505 - 2⁵ = 2778002555473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2778002555509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360307761 + ... + 360315470.

It is an arithmetic number, because the mean of its divisors is an integer number (278881190784).

Almost surely, 2^{2778002555505} is an apocalyptic number.

It is an amenable number.

2778002555505 is a deficient number, since it is larger than the sum of its proper divisors (1684096497039).

2778002555505 is a wasteful number, since it uses less digits than its factorization.

2778002555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720623496.

The product of its (nonzero) digits is 4900000, while the sum is 51.

The spelling of 2778002555505 in words is "two trillion, seven hundred seventy-eight billion, two million, five hundred fifty-five thousand, five hundred five".