40052453081 has 2 divisors, whose sum is σ = 40052453082. Its totient is φ = 40052453080.

The previous prime is 40052453053. The next prime is 40052453087. The reversal of 40052453081 is 18035425004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21731477056 + 18320976025 = 147416^2 + 135355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40052453081 is a prime.

It is a super-3 number, since 3×40052453081³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (40052453087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20026226540 + 20026226541.

It is an arithmetic number, because the mean of its divisors is an integer number (20026226541).

Almost surely, 2^40052453081 is an apocalyptic number.

It is an amenable number.

40052453081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40052453081 is an equidigital number, since it uses as much as digits as its factorization.

40052453081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 40052453081 its reverse (18035425004), we get a palindrome (58087878085).

The spelling of 40052453081 in words is "forty billion, fifty-two million, four hundred fifty-three thousand, eighty-one".