154771510391 has 2 divisors, whose sum is σ = 154771510392. Its totient is φ = 154771510390.

The previous prime is 154771510349. The next prime is 154771510403. The reversal of 154771510391 is 193015177451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154771510391 is a prime.

It is a super-2 number, since 2×154771510391² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154771510301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77385755195 + 77385755196.

It is an arithmetic number, because the mean of its divisors is an integer number (77385755196).

Almost surely, 2^154771510391 is an apocalyptic number.

154771510391 is a deficient number, since it is larger than the sum of its proper divisors (1).

154771510391 is an equidigital number, since it uses as much as digits as its factorization.

154771510391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 44.

The spelling of 154771510391 in words is "one hundred fifty-four billion, seven hundred seventy-one million, five hundred ten thousand, three hundred ninety-one".