40418287849 has 9 divisors (see below), whose sum is σ = 42256844119. Its totient is φ = 38656548040.

The previous prime is 40418287843. The next prime is 40418287853. The reversal of 40418287849 is 94878281404.

The square root of 40418287849 is 201043.

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., 7403397849 + 33014890000 = 86043^2 + 181700^2 .

It is not a de Polignac number, because 40418287849 - 2⁵ = 40418287817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40418287849.

It is not an unprimeable number, because it can be changed into a prime (40418287843) 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, 4619619 + ... + 4628359.

Almost surely, 2^40418287849 is an apocalyptic number.

40418287849 is the 201043-rd square number.

40418287849 is the 100522-nd centered octagonal number.

It is an amenable number.

40418287849 is a deficient number, since it is larger than the sum of its proper divisors (1838556270).

40418287849 is an frugal number, since it uses more digits than its factorization.

40418287849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17528 (or 8764 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 40418287849 in words is "forty billion, four hundred eighteen million, two hundred eighty-seven thousand, eight hundred forty-nine".