788881415521 has 2 divisors, whose sum is σ = 788881415522. Its totient is φ = 788881415520.

The previous prime is 788881415489. The next prime is 788881415561. The reversal of 788881415521 is 125514188887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661261712400 + 127619703121 = 813180^2 + 357239^2 .

It is a cyclic number.

It is not a de Polignac number, because 788881415521 - 2⁵ = 788881415489 is a prime.

It is not a weakly prime, because it can be changed into another prime (788881415561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394440707760 + 394440707761.

It is an arithmetic number, because the mean of its divisors is an integer number (394440707761).

Almost surely, 2^788881415521 is an apocalyptic number.

It is an amenable number.

788881415521 is a deficient number, since it is larger than the sum of its proper divisors (1).

788881415521 is an equidigital number, since it uses as much as digits as its factorization.

788881415521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5734400, while the sum is 58.

The spelling of 788881415521 in words is "seven hundred eighty-eight billion, eight hundred eighty-one million, four hundred fifteen thousand, five hundred twenty-one".