154378212671 has 4 divisors (see below), whose sum is σ = 154384931232. Its totient is φ = 154371494112.

The previous prime is 154378212607. The next prime is 154378212673. The reversal of 154378212671 is 176212873451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154378212671 - 2⁶ = 154378212607 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 (154378212673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324695 + ... + 3370808.

It is an arithmetic number, because the mean of its divisors is an integer number (38596232808).

Almost surely, 2^154378212671 is an apocalyptic number.

154378212671 is a deficient number, since it is larger than the sum of its proper divisors (6718561).

154378212671 is an equidigital number, since it uses as much as digits as its factorization.

154378212671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718560.

The product of its digits is 564480, while the sum is 47.

The spelling of 154378212671 in words is "one hundred fifty-four billion, three hundred seventy-eight million, two hundred twelve thousand, six hundred seventy-one".