40351970881 has 2 divisors, whose sum is σ = 40351970882. Its totient is φ = 40351970880.

The previous prime is 40351970843. The next prime is 40351970927. The reversal of 40351970881 is 18807915304.

It is a happy number.

It is an a-pointer prime, because the next prime (40351970927) can be obtained adding 40351970881 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37690339600 + 2661631281 = 194140^2 + 51591^2 .

It is a cyclic number.

It is not a de Polignac number, because 40351970881 - 2¹⁷ = 40351839809 is a prime.

It is a super-2 number, since 2×40351970881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40351974881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20175985440 + 20175985441.

It is an arithmetic number, because the mean of its divisors is an integer number (20175985441).

Almost surely, 2^40351970881 is an apocalyptic number.

It is an amenable number.

40351970881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40351970881 is an equidigital number, since it uses as much as digits as its factorization.

40351970881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 40351970881 in words is "forty billion, three hundred fifty-one million, nine hundred seventy thousand, eight hundred eighty-one".