154626989681768 has 8 divisors (see below), whose sum is σ = 289925605653330. Its totient is φ = 77313494840880.

The previous prime is 154626989681753. The next prime is 154626989681897. The reversal of 154626989681768 is 867186989626451.

It can be written as a sum of positive squares in only one way, i.e., 143084132921284 + 11542856760484 = 11961778^2 + 3397478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 154626989681768.

It is an unprimeable number.

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, 9664186855103 + ... + 9664186855118.

Almost surely, 2^{154626989681768} is an apocalyptic number.

It is an amenable number.

154626989681768 is a deficient number, since it is larger than the sum of its proper divisors (135298615971562).

154626989681768 is a wasteful number, since it uses less digits than its factorization.

154626989681768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19328373710227 (or 19328373710223 counting only the distinct ones).

The product of its digits is 15049359360, while the sum is 86.

The spelling of 154626989681768 in words is "one hundred fifty-four trillion, six hundred twenty-six billion, nine hundred eighty-nine million, six hundred eighty-one thousand, seven hundred sixty-eight".