154155251242 has 8 divisors (see below), whose sum is σ = 231238391076. Its totient is φ = 77075787552.

The previous prime is 154155251231. The next prime is 154155251329. The reversal of 154155251242 is 242152551451.

It can be written as a sum of positive squares in 2 ways, for example, as 118199127601 + 35956123641 = 343801^2 + 189621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811693 + ... + 983440.

Almost surely, 2^154155251242 is an apocalyptic number.

154155251242 is a deficient number, since it is larger than the sum of its proper divisors (77083139834).

154155251242 is a wasteful number, since it uses less digits than its factorization.

154155251242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838072.

The product of its digits is 80000, while the sum is 37.

The spelling of 154155251242 in words is "one hundred fifty-four billion, one hundred fifty-five million, two hundred fifty-one thousand, two hundred forty-two".