154139775978 has 32 divisors (see below), whose sum is σ = 321198151680. Its totient is φ = 49257805680.

The previous prime is 154139775949. The next prime is 154139775983. The reversal of 154139775978 is 879577931451.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3852568 + ... + 3892371.

It is an arithmetic number, because the mean of its divisors is an integer number (10037442240).

Almost surely, 2^154139775978 is an apocalyptic number.

154139775978 is an abundant number, since it is smaller than the sum of its proper divisors (167058375702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154139775978 is a wasteful number, since it uses less digits than its factorization.

154139775978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745082.

The product of its digits is 66679200, while the sum is 66.

The spelling of 154139775978 in words is "one hundred fifty-four billion, one hundred thirty-nine million, seven hundred seventy-five thousand, nine hundred seventy-eight".