58518017821 has 2 divisors, whose sum is σ = 58518017822. Its totient is φ = 58518017820.

The previous prime is 58518017791. The next prime is 58518017869. The reversal of 58518017821 is 12871081585.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58411639225 + 106378596 = 241685^2 + 10314^2 .

It is a cyclic number.

It is not a de Polignac number, because 58518017821 - 2⁹ = 58518017309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58518617821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29259008910 + 29259008911.

It is an arithmetic number, because the mean of its divisors is an integer number (29259008911).

Almost surely, 2^58518017821 is an apocalyptic number.

It is an amenable number.

58518017821 is a deficient number, since it is larger than the sum of its proper divisors (1).

58518017821 is an equidigital number, since it uses as much as digits as its factorization.

58518017821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179200, while the sum is 46.

The spelling of 58518017821 in words is "fifty-eight billion, five hundred eighteen million, seventeen thousand, eight hundred twenty-one".