40021410257 has 2 divisors, whose sum is σ = 40021410258. Its totient is φ = 40021410256.

The previous prime is 40021410229. The next prime is 40021410283. The reversal of 40021410257 is 75201412004.

It is an a-pointer prime, because the next prime (40021410283) can be obtained adding 40021410257 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31091916241 + 8929494016 = 176329^2 + 94496^2 .

It is a cyclic number.

It is not a de Polignac number, because 40021410257 - 2⁶ = 40021410193 is a prime.

It is not a weakly prime, because it can be changed into another prime (40021410157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010705128 + 20010705129.

It is an arithmetic number, because the mean of its divisors is an integer number (20010705129).

Almost surely, 2^40021410257 is an apocalyptic number.

It is an amenable number.

40021410257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021410257 is an equidigital number, since it uses as much as digits as its factorization.

40021410257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The spelling of 40021410257 in words is "forty billion, twenty-one million, four hundred ten thousand, two hundred fifty-seven".