154809753510197 has 2 divisors, whose sum is σ = 154809753510198. Its totient is φ = 154809753510196.

The previous prime is 154809753510193. The next prime is 154809753510241. The reversal of 154809753510197 is 791015357908451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135450818295556 + 19358935214641 = 11638334^2 + 4399879^2 .

It is a cyclic number.

It is not a de Polignac number, because 154809753510197 - 2² = 154809753510193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154809753510193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77404876755098 + 77404876755099.

It is an arithmetic number, because the mean of its divisors is an integer number (77404876755099).

Almost surely, 2^{154809753510197} is an apocalyptic number.

It is an amenable number.

154809753510197 is a deficient number, since it is larger than the sum of its proper divisors (1).

154809753510197 is an equidigital number, since it uses as much as digits as its factorization.

154809753510197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628000, while the sum is 65.

The spelling of 154809753510197 in words is "one hundred fifty-four trillion, eight hundred nine billion, seven hundred fifty-three million, five hundred ten thousand, one hundred ninety-seven".