457635377621 has 2 divisors, whose sum is σ = 457635377622. Its totient is φ = 457635377620.

The previous prime is 457635377593. The next prime is 457635377681. The reversal of 457635377621 is 126773536754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451657923025 + 5977454596 = 672055^2 + 77314^2 .

It is a cyclic number.

It is not a de Polignac number, because 457635377621 - 2³⁸ = 182757470677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457635377681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228817688810 + 228817688811.

It is an arithmetic number, because the mean of its divisors is an integer number (228817688811).

Almost surely, 2^457635377621 is an apocalyptic number.

It is an amenable number.

457635377621 is a deficient number, since it is larger than the sum of its proper divisors (1).

457635377621 is an equidigital number, since it uses as much as digits as its factorization.

457635377621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22226400, while the sum is 56.

The spelling of 457635377621 in words is "four hundred fifty-seven billion, six hundred thirty-five million, three hundred seventy-seven thousand, six hundred twenty-one".