40172986624 has 27 divisors (see below), whose sum is σ = 80195449327. Its totient is φ = 20084889856.

The previous prime is 40172986589. The next prime is 40172986627. The reversal of 40172986624 is 42668927104.

The square root of 40172986624 is 200432.

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

It is a super-2 number, since 2×40172986624² (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 (40172986627) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3200649 + ... + 3213175.

Almost surely, 2^40172986624 is an apocalyptic number.

40172986624 is the 200432-nd square number.

It is an amenable number.

40172986624 is a deficient number, since it is larger than the sum of its proper divisors (40022462703).

40172986624 is an frugal number, since it uses more digits than its factorization.

40172986624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25070 (or 12529 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

Multiplying 40172986624 by its sum of digits (49), we get a square (1968476344576 = 1403024²).

The spelling of 40172986624 in words is "forty billion, one hundred seventy-two million, nine hundred eighty-six thousand, six hundred twenty-four".