1178981061 has 16 divisors (see below), whose sum is σ = 1617187584. Its totient is φ = 763452864.

The previous prime is 1178981047. The next prime is 1178981077. The reversal of 1178981061 is 1601898711.

It is not a de Polignac number, because 1178981061 - 2⁵ = 1178981029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178981021) 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, 59380 + ... + 76706.

It is an arithmetic number, because the mean of its divisors is an integer number (101074224).

Almost surely, 2^1178981061 is an apocalyptic number.

It is an amenable number.

1178981061 is a deficient number, since it is larger than the sum of its proper divisors (438206523).

1178981061 is a wasteful number, since it uses less digits than its factorization.

1178981061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17980.

The product of its (nonzero) digits is 24192, while the sum is 42.

The square root of 1178981061 is about 34336.2936409858. The cubic root of 1178981061 is about 1056.4175552216.

The spelling of 1178981061 in words is "one billion, one hundred seventy-eight million, nine hundred eighty-one thousand, sixty-one".