748659438521 has 2 divisors, whose sum is σ = 748659438522. Its totient is φ = 748659438520.

The previous prime is 748659438419. The next prime is 748659438547. The reversal of 748659438521 is 125834956847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743278482496 + 5380956025 = 862136^2 + 73355^2 .

It is a cyclic number.

It is not a de Polignac number, because 748659438521 - 2²² = 748655244217 is a prime.

It is not a weakly prime, because it can be changed into another prime (748659438221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374329719260 + 374329719261.

It is an arithmetic number, because the mean of its divisors is an integer number (374329719261).

Almost surely, 2^748659438521 is an apocalyptic number.

It is an amenable number.

748659438521 is a deficient number, since it is larger than the sum of its proper divisors (1).

748659438521 is an equidigital number, since it uses as much as digits as its factorization.

748659438521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58060800, while the sum is 62.

The spelling of 748659438521 in words is "seven hundred forty-eight billion, six hundred fifty-nine million, four hundred thirty-eight thousand, five hundred twenty-one".