1481526809 has 12 divisors (see below), whose sum is σ = 1760079744. Its totient is φ = 1242859464.

The previous prime is 1481526769. The next prime is 1481526869. The reversal of 1481526809 is 9086251841.

It is not a de Polignac number, because 1481526809 - 2²⁴ = 1464749593 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1481526809.

It is not an unprimeable number, because it can be changed into a prime (1481526869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319349 + ... + 323954.

It is an arithmetic number, because the mean of its divisors is an integer number (146673312).

Almost surely, 2^1481526809 is an apocalyptic number.

It is an amenable number.

1481526809 is a deficient number, since it is larger than the sum of its proper divisors (278552935).

1481526809 is an equidigital number, since it uses as much as digits as its factorization.

1481526809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643364 (or 643357 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1481526809 is about 38490.6067632091. The cubic root of 1481526809 is about 1139.9955906775.

The spelling of 1481526809 in words is "one billion, four hundred eighty-one million, five hundred twenty-six thousand, eight hundred nine".