40826049521 has 2 divisors, whose sum is σ = 40826049522. Its totient is φ = 40826049520.

The previous prime is 40826049487. The next prime is 40826049553. The reversal of 40826049521 is 12594062804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40795920400 + 30129121 = 201980^2 + 5489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40826049521 is a prime.

It is a super-2 number, since 2×40826049521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40826049581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20413024760 + 20413024761.

It is an arithmetic number, because the mean of its divisors is an integer number (20413024761).

Almost surely, 2^40826049521 is an apocalyptic number.

It is an amenable number.

40826049521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40826049521 is an equidigital number, since it uses as much as digits as its factorization.

40826049521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 40826049521 in words is "forty billion, eight hundred twenty-six million, forty-nine thousand, five hundred twenty-one".