40172321564 has 12 divisors (see below), whose sum is σ = 70405410264. Its totient is φ = 20056490064.

The previous prime is 40172321531. The next prime is 40172321569. The reversal of 40172321564 is 46512327104.

It is a super-2 number, since 2×40172321564² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40172321569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7414634 + ... + 7420049.

It is an arithmetic number, because the mean of its divisors is an integer number (5867117522).

Almost surely, 2^40172321564 is an apocalyptic number.

It is an amenable number.

40172321564 is a deficient number, since it is larger than the sum of its proper divisors (30233088700).

40172321564 is a wasteful number, since it uses less digits than its factorization.

40172321564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835364 (or 14835362 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 40172321564 its reverse (46512327104), we get a palindrome (86684648668).

The spelling of 40172321564 in words is "forty billion, one hundred seventy-two million, three hundred twenty-one thousand, five hundred sixty-four".