40297758881 has 2 divisors, whose sum is σ = 40297758882. Its totient is φ = 40297758880.

The previous prime is 40297758877. The next prime is 40297758887. The reversal of 40297758881 is 18885779204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38988477025 + 1309281856 = 197455^2 + 36184^2 .

It is a cyclic number.

It is not a de Polignac number, because 40297758881 - 2² = 40297758877 is a prime.

It is a super-2 number, since 2×40297758881² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40297758881.

It is not a weakly prime, because it can be changed into another prime (40297758887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20148879440 + 20148879441.

It is an arithmetic number, because the mean of its divisors is an integer number (20148879441).

Almost surely, 2^40297758881 is an apocalyptic number.

It is an amenable number.

40297758881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40297758881 is an equidigital number, since it uses as much as digits as its factorization.

40297758881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 59.

The spelling of 40297758881 in words is "forty billion, two hundred ninety-seven million, seven hundred fifty-eight thousand, eight hundred eighty-one".