40522897809 has 15 divisors (see below), whose sum is σ = 60536911897. Its totient is φ = 27014057388.

The previous prime is 40522897799. The next prime is 40522897847. The reversal of 40522897809 is 90879822504.

The square root of 40522897809 is 201303.

It is a perfect power (a square), and thus also a powerful number.

40522897809 is a `hidden beast` number, since 40 + 522 + 8 + 9 + 78 + 0 + 9 = 666.

It is not a de Polignac number, because 40522897809 - 2²¹ = 40520800657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40522897859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1800544 + ... + 1822910.

Almost surely, 2^40522897809 is an apocalyptic number.

40522897809 is the 201303-rd square number.

40522897809 is the 100652-nd centered octagonal number.

It is an amenable number.

40522897809 is a deficient number, since it is larger than the sum of its proper divisors (20014014088).

40522897809 is an frugal number, since it uses more digits than its factorization.

40522897809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44746 (or 22370 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 40522897809 in words is "forty billion, five hundred twenty-two million, eight hundred ninety-seven thousand, eight hundred nine".