40751542781 has 2 divisors, whose sum is σ = 40751542782. Its totient is φ = 40751542780.

The previous prime is 40751542757. The next prime is 40751542787. The reversal of 40751542781 is 18724515704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39374464900 + 1377077881 = 198430^2 + 37109^2 .

It is a cyclic number.

It is not a de Polignac number, because 40751542781 - 2⁶ = 40751542717 is a prime.

It is a super-2 number, since 2×40751542781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40751542787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20375771390 + 20375771391.

It is an arithmetic number, because the mean of its divisors is an integer number (20375771391).

Almost surely, 2^40751542781 is an apocalyptic number.

It is an amenable number.

40751542781 is a deficient number, since it is larger than the sum of its proper divisors (1).

40751542781 is an equidigital number, since it uses as much as digits as its factorization.

40751542781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 40751542781 in words is "forty billion, seven hundred fifty-one million, five hundred forty-two thousand, seven hundred eighty-one".