40749259261 has 2 divisors, whose sum is σ = 40749259262. Its totient is φ = 40749259260.

The previous prime is 40749259151. The next prime is 40749259289. The reversal of 40749259261 is 16295294704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20447284036 + 20301975225 = 142994^2 + 142485^2 .

It is a cyclic number.

It is not a de Polignac number, because 40749259261 - 2⁹ = 40749258749 is a prime.

It is a super-2 number, since 2×40749259261² (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 (40749289261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20374629630 + 20374629631.

It is an arithmetic number, because the mean of its divisors is an integer number (20374629631).

Almost surely, 2^40749259261 is an apocalyptic number.

It is an amenable number.

40749259261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40749259261 is an equidigital number, since it uses as much as digits as its factorization.

40749259261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 40749259261 in words is "forty billion, seven hundred forty-nine million, two hundred fifty-nine thousand, two hundred sixty-one".