40521553253 has 2 divisors, whose sum is σ = 40521553254. Its totient is φ = 40521553252.

The previous prime is 40521553183. The next prime is 40521553271. The reversal of 40521553253 is 35235512504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40401804004 + 119749249 = 201002^2 + 10943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40521553253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40521550253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260776626 + 20260776627.

It is an arithmetic number, because the mean of its divisors is an integer number (20260776627).

Almost surely, 2^40521553253 is an apocalyptic number.

It is an amenable number.

40521553253 is a deficient number, since it is larger than the sum of its proper divisors (1).

40521553253 is an equidigital number, since it uses as much as digits as its factorization.

40521553253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 40521553253 in words is "forty billion, five hundred twenty-one million, five hundred fifty-three thousand, two hundred fifty-three".