40915984729 has 3 divisors (see below), whose sum is σ = 40916187007. Its totient is φ = 40915782452.

The previous prime is 40915984723. The next prime is 40915984741. The reversal of 40915984729 is 92748951904.

The square root of 40915984729 is 202277.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 40370855625 + 545129104 = 200925^2 + 23348^2 .

It is not a de Polignac number, because 40915984729 - 2³ = 40915984721 is a prime.

It is a super-2 number, since 2×40915984729² (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 (40915984721) 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, 101139 + ... + 303415.

Almost surely, 2^40915984729 is an apocalyptic number.

40915984729 is the 202277-th square number.

40915984729 is the 101139-th centered octagonal number.

It is an amenable number.

40915984729 is a deficient number, since it is larger than the sum of its proper divisors (202278).

40915984729 is an frugal number, since it uses more digits than its factorization.

40915984729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404554 (or 202277 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 40915984729 in words is "forty billion, nine hundred fifteen million, nine hundred eighty-four thousand, seven hundred twenty-nine".