40586534521 has 9 divisors (see below), whose sum is σ = 43951568781. Its totient is φ = 37462075872.

The previous prime is 40586534507. The next prime is 40586534539. The reversal of 40586534521 is 12543568504.

The square root of 40586534521 is 201461.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1895644521 + 38690890000 = 43539^2 + 196700^2 .

It is not a de Polignac number, because 40586534521 - 2²³ = 40578145913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40586534221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2611245 + ... + 2626741.

Almost surely, 2^40586534521 is an apocalyptic number.

40586534521 is the 201461-st square number.

40586534521 is the 100731-st centered octagonal number.

It is an amenable number.

40586534521 is a deficient number, since it is larger than the sum of its proper divisors (3365034260).

40586534521 is an frugal number, since it uses more digits than its factorization.

40586534521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31020 (or 15510 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 40586534521 in words is "forty billion, five hundred eighty-six million, five hundred thirty-four thousand, five hundred twenty-one".