1081817964 has 48 divisors (see below), whose sum is σ = 2873132640. Its totient is φ = 351809280.

The previous prime is 1081817921. The next prime is 1081817993. The reversal of 1081817964 is 4697181801.

It is a happy number.

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, 117729 + ... + 126584.

It is an arithmetic number, because the mean of its divisors is an integer number (59856930).

Almost surely, 2^1081817964 is an apocalyptic number.

It is an amenable number.

1081817964 is an abundant number, since it is smaller than the sum of its proper divisors (1791314676).

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

1081817964 is a wasteful number, since it uses less digits than its factorization.

1081817964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244367 (or 244359 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1081817964 is about 32891.0012617433. The cubic root of 1081817964 is about 1026.5609257956.

It can be divided in two parts, 10818 and 17964, that added together give a palindrome (28782).

The spelling of 1081817964 in words is "one billion, eighty-one million, eight hundred seventeen thousand, nine hundred sixty-four".