154878848638 has 4 divisors (see below), whose sum is σ = 232318272960. Its totient is φ = 77439424318.

The previous prime is 154878848623. The next prime is 154878848639. The reversal of 154878848638 is 836848878451.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154878848639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38719712158 + ... + 38719712161.

It is an arithmetic number, because the mean of its divisors is an integer number (58079568240).

Almost surely, 2^154878848638 is an apocalyptic number.

154878848638 is a deficient number, since it is larger than the sum of its proper divisors (77439424322).

154878848638 is an equidigital number, since it uses as much as digits as its factorization.

154878848638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77439424321.

The product of its digits is 330301440, while the sum is 70.

The spelling of 154878848638 in words is "one hundred fifty-four billion, eight hundred seventy-eight million, eight hundred forty-eight thousand, six hundred thirty-eight".