154621561045142 has 4 divisors (see below), whose sum is σ = 231932341567716. Its totient is φ = 77310780522570.

The previous prime is 154621561045111. The next prime is 154621561045157. The reversal of 154621561045142 is 241540165126451.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38655390261284 + ... + 38655390261287.

It is an arithmetic number, because the mean of its divisors is an integer number (57983085391929).

Almost surely, 2^{154621561045142} is an apocalyptic number.

154621561045142 is a deficient number, since it is larger than the sum of its proper divisors (77310780522574).

154621561045142 is an equidigital number, since it uses as much as digits as its factorization.

154621561045142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77310780522573.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 154621561045142 in words is "one hundred fifty-four trillion, six hundred twenty-one billion, five hundred sixty-one million, forty-five thousand, one hundred forty-two".