40727792439890 has 16 divisors (see below), whose sum is σ = 74314273330008. Its totient is φ = 16067950989696.

The previous prime is 40727792439839. The next prime is 40727792439923. The reversal of 40727792439890 is 9893429772704.

It is a Cunningham number, because it is equal to 6381833²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 23119085349361 + 17608707090529 = 4808231^2 + 4196273^2 .

It is a super-2 number, since 2×40727792439890² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27895747517 + ... + 27895748976.

Almost surely, 2^{40727792439890} is an apocalyptic number.

40727792439890 is a deficient number, since it is larger than the sum of its proper divisors (33586480890118).

40727792439890 is a wasteful number, since it uses less digits than its factorization.

40727792439890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55791496573.

The product of its (nonzero) digits is 384072192, while the sum is 71.

The spelling of 40727792439890 in words is "forty trillion, seven hundred twenty-seven billion, seven hundred ninety-two million, four hundred thirty-nine thousand, eight hundred ninety".