1178267561655 has 16 divisors (see below), whose sum is σ = 1893460541280. Its totient is φ = 625665218688.

The previous prime is 1178267561641. The next prime is 1178267561659. The reversal of 1178267561655 is 5561657628711.

It is not a de Polignac number, because 1178267561655 - 2⁵ = 1178267561623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178267561659) 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, 171505672 + ... + 171512541.

It is an arithmetic number, because the mean of its divisors is an integer number (118341283830).

Almost surely, 2^{1178267561655} is an apocalyptic number.

1178267561655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1178267561655 is a deficient number, since it is larger than the sum of its proper divisors (715192979625).

1178267561655 is a wasteful number, since it uses less digits than its factorization.

1178267561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343018450.

The product of its digits is 21168000, while the sum is 60.

The spelling of 1178267561655 in words is "one trillion, one hundred seventy-eight billion, two hundred sixty-seven million, five hundred sixty-one thousand, six hundred fifty-five".