1081495509 has 16 divisors (see below), whose sum is σ = 1449302400. Its totient is φ = 717353280.

The previous prime is 1081495483. The next prime is 1081495517. The reversal of 1081495509 is 9055941801.

It is not a de Polignac number, because 1081495509 - 2¹² = 1081491413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081495529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659839 + ... + 661475.

It is an arithmetic number, because the mean of its divisors is an integer number (90581400).

Almost surely, 2^1081495509 is an apocalyptic number.

It is an amenable number.

1081495509 is a deficient number, since it is larger than the sum of its proper divisors (367806891).

1081495509 is a wasteful number, since it uses less digits than its factorization.

1081495509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 1081495509 is about 32886.0990237517. The cubic root of 1081495509 is about 1026.4589207731.

The spelling of 1081495509 in words is "one billion, eighty-one million, four hundred ninety-five thousand, five hundred nine".