40217494849 has 9 divisors (see below), whose sum is σ = 46785249507. Its totient is φ = 34470935184.

The previous prime is 40217494841. The next prime is 40217494861. The reversal of 40217494849 is 94849471204.

The square root of 40217494849 is 200543.

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

It can be written as a sum of positive squares in only one way, i.e., 18443541249 + 21773953600 = 135807^2 + 147560^2 .

It is not a de Polignac number, because 40217494849 - 2³ = 40217494841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40217494796 and 40217494805.

It is not an unprimeable number, because it can be changed into a prime (40217494841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1389477 + ... + 1418125.

Almost surely, 2^40217494849 is an apocalyptic number.

40217494849 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40217494849 is the 200543-rd square number.

40217494849 is the 100272-nd centered octagonal number.

It is an amenable number.

40217494849 is a deficient number, since it is larger than the sum of its proper divisors (6567754658).

40217494849 is an frugal number, since it uses more digits than its factorization.

40217494849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57312 (or 28656 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 40217494849 in words is "forty billion, two hundred seventeen million, four hundred ninety-four thousand, eight hundred forty-nine".