123198022549 has 16 divisors (see below), whose sum is σ = 146937415680. Its totient is φ = 100994675760.

The previous prime is 123198022477. The next prime is 123198022567. The reversal of 123198022549 is 945220891321.

It is a cyclic number.

It is not a de Polignac number, because 123198022549 - 2⁷ = 123198022421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123198022499 and 123198022508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123198025549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408312 + ... + 1493230.

It is an arithmetic number, because the mean of its divisors is an integer number (9183588480).

Almost surely, 2^123198022549 is an apocalyptic number.

It is an amenable number.

123198022549 is a deficient number, since it is larger than the sum of its proper divisors (23739393131).

123198022549 is an equidigital number, since it uses as much as digits as its factorization.

123198022549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93960.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 123198022549 in words is "one hundred twenty-three billion, one hundred ninety-eight million, twenty-two thousand, five hundred forty-nine".