1081312596 has 216 divisors, whose sum is σ = 3484792584. Its totient is φ = 280143360.

The previous prime is 1081312567. The next prime is 1081312607. The reversal of 1081312596 is 6952131801.

It can be written as a sum of positive squares in 4 ways, for example, as 141276996 + 940035600 = 11886^2 + 30660^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1081312596.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1398466 + ... + 1399238.

It is an arithmetic number, because the mean of its divisors is an integer number (16133299).

Almost surely, 2^1081312596 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081312596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742396292).

1081312596 is an abundant number, since it is smaller than the sum of its proper divisors (2403479988).

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

1081312596 is a wasteful number, since it uses less digits than its factorization.

1081312596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1081312596 is about 32883.3178982900. The cubic root of 1081312596 is about 1026.4010492840.

It can be divided in two parts, 10813 and 12596, that added together give a square (23409 = 153²).

The spelling of 1081312596 in words is "one billion, eighty-one million, three hundred twelve thousand, five hundred ninety-six".