1655010009 has 8 divisors (see below), whose sum is σ = 2451866720. Its totient is φ = 1103339988.

The previous prime is 1655009987. The next prime is 1655010017. The reversal of 1655010009 is 9000105561.

1655010009 is a `hidden beast` number, since 1 + 6 + 550 + 100 + 0 + 9 = 666.

It is not a de Polignac number, because 1655010009 - 2²⁹ = 1118139097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 61296667 = 1655010009 / (1 + 6 + 5 + 5 + 0 + 1 + 0 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655010109) 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, 30648307 + ... + 30648360.

It is an arithmetic number, because the mean of its divisors is an integer number (306483340).

Almost surely, 2^1655010009 is an apocalyptic number.

It is an amenable number.

1655010009 is a deficient number, since it is larger than the sum of its proper divisors (796856711).

1655010009 is an equidigital number, since it uses as much as digits as its factorization.

1655010009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61296676 (or 61296670 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 1655010009 is about 40681.8142294564. The cubic root of 1655010009 is about 1182.8605331353.

The spelling of 1655010009 in words is "one billion, six hundred fifty-five million, ten thousand, nine".