1156136171778 has 32 divisors (see below), whose sum is σ = 2936218849920. Its totient is φ = 330324620400.

The previous prime is 1156136171767. The next prime is 1156136171807. The reversal of 1156136171778 is 8771716316511.

1156136171778 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 1 + 3 + 617 + 17 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1529280273 + ... + 1529281028.

It is an arithmetic number, because the mean of its divisors is an integer number (91756839060).

Almost surely, 2^{1156136171778} is an apocalyptic number.

1156136171778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1156136171778 is an abundant number, since it is smaller than the sum of its proper divisors (1780082678142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156136171778 is a wasteful number, since it uses less digits than its factorization.

1156136171778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058561319 (or 3058561313 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 54.

The spelling of 1156136171778 in words is "one trillion, one hundred fifty-six billion, one hundred thirty-six million, one hundred seventy-one thousand, seven hundred seventy-eight".