881988397057 has 2 divisors, whose sum is σ = 881988397058. Its totient is φ = 881988397056.

The previous prime is 881988396907. The next prime is 881988397091. The reversal of 881988397057 is 750793889188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862299817201 + 19688579856 = 928601^2 + 140316^2 .

It is a cyclic number.

It is not a de Polignac number, because 881988397057 - 2¹¹ = 881988395009 is a prime.

It is a super-2 number, since 2×881988397057² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (881988397757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440994198528 + 440994198529.

It is an arithmetic number, because the mean of its divisors is an integer number (440994198529).

Almost surely, 2^881988397057 is an apocalyptic number.

It is an amenable number.

881988397057 is a deficient number, since it is larger than the sum of its proper divisors (1).

881988397057 is an equidigital number, since it uses as much as digits as its factorization.

881988397057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243855360, while the sum is 73.

The spelling of 881988397057 in words is "eight hundred eighty-one billion, nine hundred eighty-eight million, three hundred ninety-seven thousand, fifty-seven".