23557031845049 has 2 divisors, whose sum is σ = 23557031845050. Its totient is φ = 23557031845048.

The previous prime is 23557031845027. The next prime is 23557031845051. The reversal of 23557031845049 is 94054813075532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15562236010000 + 7994795835049 = 3944900^2 + 2827507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23557031845049 is a prime.

Together with 23557031845051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23557031844985 and 23557031845003.

It is not a weakly prime, because it can be changed into another prime (23557031845649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778515922524 + 11778515922525.

It is an arithmetic number, because the mean of its divisors is an integer number (11778515922525).

Almost surely, 2^{23557031845049} is an apocalyptic number.

It is an amenable number.

23557031845049 is a deficient number, since it is larger than the sum of its proper divisors (1).

23557031845049 is an equidigital number, since it uses as much as digits as its factorization.

23557031845049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144000, while the sum is 56.

The spelling of 23557031845049 in words is "twenty-three trillion, five hundred fifty-seven billion, thirty-one million, eight hundred forty-five thousand, forty-nine".