1178155961055 has 32 divisors (see below), whose sum is σ = 2097950208000. Its totient is φ = 627314629536.

The previous prime is 1178155961051. The next prime is 1178155961107. The reversal of 1178155961055 is 5501695518711.

1178155961055 is a `hidden beast` number, since 1 + 1 + 7 + 8 + 15 + 5 + 9 + 610 + 5 + 5 = 666.

It is not a de Polignac number, because 1178155961055 - 2² = 1178155961051 is a prime.

It is a super-3 number, since 3×1178155961055³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1178155960992 and 1178155961010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178155961051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7106755 + ... + 7270644.

It is an arithmetic number, because the mean of its divisors is an integer number (65560944000).

Almost surely, 2^{1178155961055} is an apocalyptic number.

1178155961055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1178155961055 is a deficient number, since it is larger than the sum of its proper divisors (919794246945).

1178155961055 is a wasteful number, since it uses less digits than its factorization.

1178155961055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14378020 (or 14378014 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 54.

The spelling of 1178155961055 in words is "one trillion, one hundred seventy-eight billion, one hundred fifty-five million, nine hundred sixty-one thousand, fifty-five".