57721619370839 has 2 divisors, whose sum is σ = 57721619370840. Its totient is φ = 57721619370838.

The previous prime is 57721619370797. The next prime is 57721619370841. The reversal of 57721619370839 is 93807391612775.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57721619370839 - 2³⁶ = 57652899894103 is a prime.

Together with 57721619370841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57721619370539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28860809685419 + 28860809685420.

It is an arithmetic number, because the mean of its divisors is an integer number (28860809685420).

Almost surely, 2^{57721619370839} is an apocalyptic number.

57721619370839 is a deficient number, since it is larger than the sum of its proper divisors (1).

57721619370839 is an equidigital number, since it uses as much as digits as its factorization.

57721619370839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120022560, while the sum is 68.

The spelling of 57721619370839 in words is "fifty-seven trillion, seven hundred twenty-one billion, six hundred nineteen million, three hundred seventy thousand, eight hundred thirty-nine".