787891597481 has 2 divisors, whose sum is σ = 787891597482. Its totient is φ = 787891597480.

The previous prime is 787891597477. The next prime is 787891597511. The reversal of 787891597481 is 184795198787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774083232400 + 13808365081 = 879820^2 + 117509^2 .

It is a cyclic number.

It is not a de Polignac number, because 787891597481 - 2² = 787891597477 is a prime.

It is a super-2 number, since 2×787891597481² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 787891597399 and 787891597408.

It is not a weakly prime, because it can be changed into another prime (787891587481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393945798740 + 393945798741.

It is an arithmetic number, because the mean of its divisors is an integer number (393945798741).

Almost surely, 2^787891597481 is an apocalyptic number.

It is an amenable number.

787891597481 is a deficient number, since it is larger than the sum of its proper divisors (1).

787891597481 is an equidigital number, since it uses as much as digits as its factorization.

787891597481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 284497920, while the sum is 74.

The spelling of 787891597481 in words is "seven hundred eighty-seven billion, eight hundred ninety-one million, five hundred ninety-seven thousand, four hundred eighty-one".