40164561533 has 12 divisors (see below), whose sum is σ = 41068362972. Its totient is φ = 39280253760.

The previous prime is 40164561523. The next prime is 40164561551. The reversal of 40164561533 is 33516546104.

It can be written as a sum of positive squares in 2 ways, for example, as 9365013529 + 30799548004 = 96773^2 + 175498^2 .

It is not a de Polignac number, because 40164561533 - 2¹⁰ = 40164560509 is a prime.

It is a super-2 number, since 2×40164561533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40164561523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3265391 + ... + 3277667.

It is an arithmetic number, because the mean of its divisors is an integer number (3422363581).

Almost surely, 2^40164561533 is an apocalyptic number.

It is an amenable number.

40164561533 is a deficient number, since it is larger than the sum of its proper divisors (903801439).

40164561533 is a wasteful number, since it uses less digits than its factorization.

40164561533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13852 (or 13805 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 40164561533 in words is "forty billion, one hundred sixty-four million, five hundred sixty-one thousand, five hundred thirty-three".