1081381504 has 64 divisors (see below), whose sum is σ = 2591697600. Its totient is φ = 439050240.

The previous prime is 1081381481. The next prime is 1081381507. The reversal of 1081381504 is 4051831801.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1081381507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14737 + ... + 48784.

It is an arithmetic number, because the mean of its divisors is an integer number (40495275).

Almost surely, 2^1081381504 is an apocalyptic number.

1081381504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1081381504 is an abundant number, since it is smaller than the sum of its proper divisors (1510316096).

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

1081381504 is an equidigital number, since it uses as much as digits as its factorization.

1081381504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63561 (or 63549 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1081381504 is about 32884.3656469149. The cubic root of 1081381504 is about 1026.4228517185.

The spelling of 1081381504 in words is "one billion, eighty-one million, three hundred eighty-one thousand, five hundred four".