198415793951 has 2 divisors, whose sum is σ = 198415793952. Its totient is φ = 198415793950.

The previous prime is 198415793843. The next prime is 198415793957. The reversal of 198415793951 is 159397514891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198415793951 is a prime.

It is a super-3 number, since 3×198415793951³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198415793957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99207896975 + 99207896976.

It is an arithmetic number, because the mean of its divisors is an integer number (99207896976).

Almost surely, 2^198415793951 is an apocalyptic number.

198415793951 is a deficient number, since it is larger than the sum of its proper divisors (1).

198415793951 is an equidigital number, since it uses as much as digits as its factorization.

198415793951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 62.

The spelling of 198415793951 in words is "one hundred ninety-eight billion, four hundred fifteen million, seven hundred ninety-three thousand, nine hundred fifty-one".