154136523160042 has 4 divisors (see below), whose sum is σ = 231204784740066. Its totient is φ = 77068261580020.

The previous prime is 154136523160031. The next prime is 154136523160133. The reversal of 154136523160042 is 240061325631451.

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

It can be written as a sum of positive squares in only one way, i.e., 145477104609321 + 8659418550721 = 12061389^2 + 2942689^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38534130790009 + ... + 38534130790012.

Almost surely, 2^{154136523160042} is an apocalyptic number.

154136523160042 is a deficient number, since it is larger than the sum of its proper divisors (77068261580024).

154136523160042 is an equidigital number, since it uses as much as digits as its factorization.

154136523160042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77068261580023.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 154136523160042 its reverse (240061325631451), we get a palindrome (394197848791493).

The spelling of 154136523160042 in words is "one hundred fifty-four trillion, one hundred thirty-six billion, five hundred twenty-three million, one hundred sixty thousand, forty-two".