1156520064 has 128 divisors (see below), whose sum is σ = 3717532800. Its totient is φ = 310984704.

The previous prime is 1156520041. The next prime is 1156520119. The reversal of 1156520064 is 4600256511.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33042 + ... + 58350.

It is an arithmetic number, because the mean of its divisors is an integer number (29043225).

Almost surely, 2^1156520064 is an apocalyptic number.

1156520064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156520064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1858766400).

1156520064 is an abundant number, since it is smaller than the sum of its proper divisors (2561012736).

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

1156520064 is a wasteful number, since it uses less digits than its factorization.

1156520064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25350 (or 25338 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1156520064 is about 34007.6471400184. The cubic root of 1156520064 is about 1049.6658238141.

Adding to 1156520064 its reverse (4600256511), we get a palindrome (5756776575).

The spelling of 1156520064 in words is "one billion, one hundred fifty-six million, five hundred twenty thousand, sixty-four".