154434242638 has 48 divisors (see below), whose sum is σ = 268742111904. Its totient is φ = 66139476480.

The previous prime is 154434242629. The next prime is 154434242657. The reversal of 154434242638 is 836242434451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388756 + ... + 678232.

It is an arithmetic number, because the mean of its divisors is an integer number (5598793998).

Almost surely, 2^154434242638 is an apocalyptic number.

154434242638 is a deficient number, since it is larger than the sum of its proper divisors (114307869266).

154434242638 is a wasteful number, since it uses less digits than its factorization.

154434242638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289597 (or 289580 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 46.

The spelling of 154434242638 in words is "one hundred fifty-four billion, four hundred thirty-four million, two hundred forty-two thousand, six hundred thirty-eight".