40432537125809 has 2 divisors, whose sum is σ = 40432537125810. Its totient is φ = 40432537125808.

The previous prime is 40432537125803. The next prime is 40432537125863. The reversal of 40432537125809 is 90852173523404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24190855296400 + 16241681829409 = 4918420^2 + 4030097^2 .

It is a cyclic number.

It is not a de Polignac number, because 40432537125809 - 2⁴ = 40432537125793 is a prime.

It is a super-2 number, since 2×40432537125809² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40432537125803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20216268562904 + 20216268562905.

It is an arithmetic number, because the mean of its divisors is an integer number (20216268562905).

Almost surely, 2^{40432537125809} is an apocalyptic number.

It is an amenable number.

40432537125809 is a deficient number, since it is larger than the sum of its proper divisors (1).

40432537125809 is an equidigital number, since it uses as much as digits as its factorization.

40432537125809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 40432537125809 in words is "forty trillion, four hundred thirty-two billion, five hundred thirty-seven million, one hundred twenty-five thousand, eight hundred nine".