40836730561 has 9 divisors (see below), whose sum is σ = 44889097729. Its totient is φ = 37122279700.

The previous prime is 40836730553. The next prime is 40836730619. The reversal of 40836730561 is 16503763804.

The square root of 40836730561 is 202081.

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

It is not a de Polignac number, because 40836730561 - 2³ = 40836730553 is a prime.

It is a super-2 number, since 2×40836730561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40836730531) 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, 2213706 + ... + 2232076.

Almost surely, 2^40836730561 is an apocalyptic number.

40836730561 is the 202081-st square number.

40836730561 is the 101041-st centered octagonal number.

It is an amenable number.

40836730561 is a deficient number, since it is larger than the sum of its proper divisors (4052367168).

40836730561 is an frugal number, since it uses more digits than its factorization.

40836730561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36764 (or 18382 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 40836730561 in words is "forty billion, eight hundred thirty-six million, seven hundred thirty thousand, five hundred sixty-one".