40172526823 has 32 divisors (see below), whose sum is σ = 51839746560. Its totient is φ = 30548327040.

The previous prime is 40172526799. The next prime is 40172526839. The reversal of 40172526823 is 32862527104.

It is a de Polignac number, because none of the positive numbers 2^k-40172526823 is a prime.

It is a super-2 number, since 2×40172526823² (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 (40172526883) 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 31 ways as a sum of consecutive naturals, for example, 258936 + ... + 383917.

It is an arithmetic number, because the mean of its divisors is an integer number (1619992080).

Almost surely, 2^40172526823 is an apocalyptic number.

40172526823 is a deficient number, since it is larger than the sum of its proper divisors (11667219737).

40172526823 is a wasteful number, since it uses less digits than its factorization.

40172526823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642919.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 40172526823 in words is "forty billion, one hundred seventy-two million, five hundred twenty-six thousand, eight hundred twenty-three".