57421951549 has 2 divisors, whose sum is σ = 57421951550. Its totient is φ = 57421951548.

The previous prime is 57421951541. The next prime is 57421951567. The reversal of 57421951549 is 94515912475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37594495449 + 19827456100 = 193893^2 + 140810^2 .

It is a cyclic number.

It is not a de Polignac number, because 57421951549 - 2³ = 57421951541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57421951496 and 57421951505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57421951541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28710975774 + 28710975775.

It is an arithmetic number, because the mean of its divisors is an integer number (28710975775).

Almost surely, 2^57421951549 is an apocalyptic number.

It is an amenable number.

57421951549 is a deficient number, since it is larger than the sum of its proper divisors (1).

57421951549 is an equidigital number, since it uses as much as digits as its factorization.

57421951549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 52.

The spelling of 57421951549 in words is "fifty-seven billion, four hundred twenty-one million, nine hundred fifty-one thousand, five hundred forty-nine".