40134563125581 has 16 divisors (see below), whose sum is σ = 54959412158784. Its totient is φ = 26033054511744.

The previous prime is 40134563125571. The next prime is 40134563125589. The reversal of 40134563125581 is 18552136543104.

It is not a de Polignac number, because 40134563125581 - 2⁵ = 40134563125549 is a prime.

It is a super-2 number, since 2×40134563125581² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40134563125581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40134563125589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16457266 + ... + 18737948.

It is an arithmetic number, because the mean of its divisors is an integer number (3434963259924).

Almost surely, 2^{40134563125581} is an apocalyptic number.

It is an amenable number.

40134563125581 is a deficient number, since it is larger than the sum of its proper divisors (14824849033203).

40134563125581 is a wasteful number, since it uses less digits than its factorization.

40134563125581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439260.

The product of its (nonzero) digits is 1728000, while the sum is 48.

Adding to 40134563125581 its reverse (18552136543104), we get a palindrome (58686699668685).

The spelling of 40134563125581 in words is "forty trillion, one hundred thirty-four billion, five hundred sixty-three million, one hundred twenty-five thousand, five hundred eighty-one".