154591139431 has 2 divisors, whose sum is σ = 154591139432. Its totient is φ = 154591139430.

The previous prime is 154591139387. The next prime is 154591139471. The reversal of 154591139431 is 134931195451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154591139431 - 2⁷ = 154591139303 is a prime.

It is a super-2 number, since 2×154591139431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154591139471) 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, 77295569715 + 77295569716.

It is an arithmetic number, because the mean of its divisors is an integer number (77295569716).

Almost surely, 2^154591139431 is an apocalyptic number.

154591139431 is a deficient number, since it is larger than the sum of its proper divisors (1).

154591139431 is an equidigital number, since it uses as much as digits as its factorization.

154591139431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 46.

The spelling of 154591139431 in words is "one hundred fifty-four billion, five hundred ninety-one million, one hundred thirty-nine thousand, four hundred thirty-one".