881948625557 has 2 divisors, whose sum is σ = 881948625558. Its totient is φ = 881948625556.

The previous prime is 881948625539. The next prime is 881948625563. The reversal of 881948625557 is 755526849188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 782421626116 + 99526999441 = 884546^2 + 315479^2 .

It is a cyclic number.

It is not a de Polignac number, because 881948625557 - 2⁸ = 881948625301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881948625527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440974312778 + 440974312779.

It is an arithmetic number, because the mean of its divisors is an integer number (440974312779).

Almost surely, 2^881948625557 is an apocalyptic number.

It is an amenable number.

881948625557 is a deficient number, since it is larger than the sum of its proper divisors (1).

881948625557 is an equidigital number, since it uses as much as digits as its factorization.

881948625557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536000, while the sum is 68.

The spelling of 881948625557 in words is "eight hundred eighty-one billion, nine hundred forty-eight million, six hundred twenty-five thousand, five hundred fifty-seven".