1260981564855 has 16 divisors (see below), whose sum is σ = 2025015419904. Its totient is φ = 670041862560.

The previous prime is 1260981564851. The next prime is 1260981564917. The reversal of 1260981564855 is 5584651890621.

It is not a de Polignac number, because 1260981564855 - 2² = 1260981564851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260981564851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155098219 + ... + 155106348.

It is an arithmetic number, because the mean of its divisors is an integer number (126563463744).

Almost surely, 2^{1260981564855} is an apocalyptic number.

1260981564855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1260981564855 is a deficient number, since it is larger than the sum of its proper divisors (764033855049).

1260981564855 is a wasteful number, since it uses less digits than its factorization.

1260981564855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310204846.

The product of its (nonzero) digits is 20736000, while the sum is 60.

The spelling of 1260981564855 in words is "one trillion, two hundred sixty billion, nine hundred eighty-one million, five hundred sixty-four thousand, eight hundred fifty-five".