1181400064 has 44 divisors (see below), whose sum is σ = 2543340184. Its totient is φ = 545255424.

The previous prime is 1181400061. The next prime is 1181400067. The reversal of 1181400064 is 4600041811.

It is an interprime number because it is at equal distance from previous prime (1181400061) and next prime (1181400067).

It is a super-2 number, since 2×1181400064² = 2791412222438408192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181400061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31062 + ... + 57685.

It is an arithmetic number, because the mean of its divisors is an integer number (57803186).

Almost surely, 2^1181400064 is an apocalyptic number.

It is an amenable number.

1181400064 is an abundant number, since it is smaller than the sum of its proper divisors (1361940120).

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

1181400064 is an equidigital number, since it uses as much as digits as its factorization.

1181400064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88780 (or 88762 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1181400064 is about 34371.5007528039. The cubic root of 1181400064 is about 1057.1395717592.

Adding to 1181400064 its reverse (4600041811), we get a palindrome (5781441875).

The spelling of 1181400064 in words is "one billion, one hundred eighty-one million, four hundred thousand, sixty-four".