535691519981 has 2 divisors, whose sum is σ = 535691519982. Its totient is φ = 535691519980.

The previous prime is 535691519897. The next prime is 535691520031. The reversal of 535691519981 is 189915196535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297825598756 + 237865921225 = 545734^2 + 487715^2 .

It is a cyclic number.

It is not a de Polignac number, because 535691519981 - 2³⁸ = 260813613037 is a prime.

It is a super-2 number, since 2×535691519981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (535691519081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267845759990 + 267845759991.

It is an arithmetic number, because the mean of its divisors is an integer number (267845759991).

Almost surely, 2^535691519981 is an apocalyptic number.

It is an amenable number.

535691519981 is a deficient number, since it is larger than the sum of its proper divisors (1).

535691519981 is an equidigital number, since it uses as much as digits as its factorization.

535691519981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122000, while the sum is 62.

The spelling of 535691519981 in words is "five hundred thirty-five billion, six hundred ninety-one million, five hundred nineteen thousand, nine hundred eighty-one".