199633401551 has 2 divisors, whose sum is σ = 199633401552. Its totient is φ = 199633401550.

The previous prime is 199633401523. The next prime is 199633401577. The reversal of 199633401551 is 155104336991.

It is a strong prime.

It is an emirp because it is prime and its reverse (155104336991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199633401551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199633401496 and 199633401505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199633401511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99816700775 + 99816700776.

It is an arithmetic number, because the mean of its divisors is an integer number (99816700776).

Almost surely, 2^199633401551 is an apocalyptic number.

199633401551 is a deficient number, since it is larger than the sum of its proper divisors (1).

199633401551 is an equidigital number, since it uses as much as digits as its factorization.

199633401551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 199633401551 in words is "one hundred ninety-nine billion, six hundred thirty-three million, four hundred one thousand, five hundred fifty-one".