1357385809 has 32 divisors (see below), whose sum is σ = 1554868224. Its totient is φ = 1176215040.

The previous prime is 1357385753. The next prime is 1357385837. The reversal of 1357385809 is 9085837531.

It is not a de Polignac number, because 1357385809 - 2⁹ = 1357385297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1357385839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2199669 + ... + 2200285.

It is an arithmetic number, because the mean of its divisors is an integer number (48589632).

Almost surely, 2^1357385809 is an apocalyptic number.

It is an amenable number.

1357385809 is a deficient number, since it is larger than the sum of its proper divisors (197482415).

1357385809 is a wasteful number, since it uses less digits than its factorization.

1357385809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 1357385809 is about 36842.7171772116. The cubic root of 1357385809 is about 1107.2213075470.

The spelling of 1357385809 in words is "one billion, three hundred fifty-seven million, three hundred eighty-five thousand, eight hundred nine".