101245643549 has 2 divisors, whose sum is σ = 101245643550. Its totient is φ = 101245643548.

The previous prime is 101245643483. The next prime is 101245643567. The reversal of 101245643549 is 945346542101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101015908900 + 229734649 = 317830^2 + 15157^2 .

It is a cyclic number.

It is not a de Polignac number, because 101245643549 - 2¹⁶ = 101245578013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101245643579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50622821774 + 50622821775.

It is an arithmetic number, because the mean of its divisors is an integer number (50622821775).

Almost surely, 2^101245643549 is an apocalyptic number.

It is an amenable number.

101245643549 is a deficient number, since it is larger than the sum of its proper divisors (1).

101245643549 is an equidigital number, since it uses as much as digits as its factorization.

101245643549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 101245643549 in words is "one hundred one billion, two hundred forty-five million, six hundred forty-three thousand, five hundred forty-nine".