40520652722521 has 2 divisors, whose sum is σ = 40520652722522. Its totient is φ = 40520652722520.

The previous prime is 40520652722453. The next prime is 40520652722567. The reversal of 40520652722521 is 12522725602504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37992985184025 + 2527667538496 = 6163845^2 + 1589864^2 .

It is a cyclic number.

It is not a de Polignac number, because 40520652722521 - 2¹⁹ = 40520652198233 is a prime.

It is not a weakly prime, because it can be changed into another prime (40520652722581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260326361260 + 20260326361261.

It is an arithmetic number, because the mean of its divisors is an integer number (20260326361261).

Almost surely, 2^{40520652722521} is an apocalyptic number.

It is an amenable number.

40520652722521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40520652722521 is an equidigital number, since it uses as much as digits as its factorization.

40520652722521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 40520652722521 in words is "forty trillion, five hundred twenty billion, six hundred fifty-two million, seven hundred twenty-two thousand, five hundred twenty-one".