1181601078 has 32 divisors (see below), whose sum is σ = 2701921536. Its totient is φ = 337460448.

The previous prime is 1181601077. The next prime is 1181601101. The reversal of 1181601078 is 8701061811.

It is a super-2 number, since 2×1181601078² = 2792362215061524168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181601077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139225 + ... + 147467.

It is an arithmetic number, because the mean of its divisors is an integer number (84435048).

Almost surely, 2^1181601078 is an apocalyptic number.

1181601078 is an abundant number, since it is smaller than the sum of its proper divisors (1520320458).

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

1181601078 is a wasteful number, since it uses less digits than its factorization.

1181601078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11668.

The product of its (nonzero) digits is 2688, while the sum is 33.

The square root of 1181601078 is about 34374.4247660961. The cubic root of 1181601078 is about 1057.1995254276.

Adding to 1181601078 its reverse (8701061811), we get a palindrome (9882662889).

The spelling of 1181601078 in words is "one billion, one hundred eighty-one million, six hundred one thousand, seventy-eight".