154644642 has 12 divisors (see below), whose sum is σ = 335063430. Its totient is φ = 51548208.

The previous prime is 154644593. The next prime is 154644649. The reversal of 154644642 is 246446451.

154644642 is a `hidden beast` number, since 1 + 5 + 4 + 6 + 4 + 4 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134583201 + 20061441 = 11601^2 + 4479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 154644597 and 154644606.

It is not an unprimeable number, because it can be changed into a prime (154644649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4295667 + ... + 4295702.

Almost surely, 2^154644642 is an apocalyptic number.

154644642 is an abundant number, since it is smaller than the sum of its proper divisors (180418788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154644642 is a wasteful number, since it uses less digits than its factorization.

154644642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8591377 (or 8591374 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 154644642 is about 12435.6198880474. The cubic root of 154644642 is about 536.7577114073.

The spelling of 154644642 in words is "one hundred fifty-four million, six hundred forty-four thousand, six hundred forty-two".