40756957849 has 2 divisors, whose sum is σ = 40756957850. Its totient is φ = 40756957848.

The previous prime is 40756957841. The next prime is 40756957873. The reversal of 40756957849 is 94875965704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23510702224 + 17246255625 = 153332^2 + 131325^2 .

It is a cyclic number.

It is not a de Polignac number, because 40756957849 - 2³ = 40756957841 is a prime.

It is a super-3 number, since 3×40756957849³ (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 (40756957841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20378478924 + 20378478925.

It is an arithmetic number, because the mean of its divisors is an integer number (20378478925).

Almost surely, 2^40756957849 is an apocalyptic number.

It is an amenable number.

40756957849 is a deficient number, since it is larger than the sum of its proper divisors (1).

40756957849 is an equidigital number, since it uses as much as digits as its factorization.

40756957849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76204800, while the sum is 64.

The spelling of 40756957849 in words is "forty billion, seven hundred fifty-six million, nine hundred fifty-seven thousand, eight hundred forty-nine".