154778640164 has 24 divisors (see below), whose sum is σ = 286808594688. Its totient is φ = 72833736320.

The previous prime is 154778640151. The next prime is 154778640287. The reversal of 154778640164 is 461046877451.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2194529 + ... + 2263959.

It is an arithmetic number, because the mean of its divisors is an integer number (11950358112).

Almost surely, 2^154778640164 is an apocalyptic number.

It is an amenable number.

154778640164 is a deficient number, since it is larger than the sum of its proper divisors (132029954524).

154778640164 is a wasteful number, since it uses less digits than its factorization.

154778640164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102235 (or 102233 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 154778640164 in words is "one hundred fifty-four billion, seven hundred seventy-eight million, six hundred forty thousand, one hundred sixty-four".