154431320442551 has 16 divisors (see below), whose sum is σ = 157035025062720. Its totient is φ = 151848893644800.

The previous prime is 154431320442473. The next prime is 154431320442583. The reversal of 154431320442551 is 155244023134451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154431320442551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154431320402551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8129630 + ... + 19363716.

It is an arithmetic number, because the mean of its divisors is an integer number (9814689066420).

Almost surely, 2^{154431320442551} is an apocalyptic number.

154431320442551 is a deficient number, since it is larger than the sum of its proper divisors (2603704620169).

154431320442551 is a wasteful number, since it uses less digits than its factorization.

154431320442551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235034.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 154431320442551 in words is "one hundred fifty-four trillion, four hundred thirty-one billion, three hundred twenty million, four hundred forty-two thousand, five hundred fifty-one".