154642644 has 36 divisors (see below), whose sum is σ = 420972916. Its totient is φ = 47582208.

The previous prime is 154642637. The next prime is 154642661. The reversal of 154642644 is 446246451.

154642644 is a `hidden beast` number, since 1 + 5 + 4 + 6 + 4 + 2 + 644 = 666.

154642644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 92390544 + 62252100 = 9612^2 + 7890^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 154642599 and 154642608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164749 + ... + 165684.

Almost surely, 2^154642644 is an apocalyptic number.

It is an amenable number.

154642644 is an abundant number, since it is smaller than the sum of its proper divisors (266330272).

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

154642644 is a wasteful number, since it uses less digits than its factorization.

154642644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330456 (or 330451 counting only the distinct ones).

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

The square root of 154642644 is about 12435.5395540362. The cubic root of 154642644 is about 536.7553997710.

The spelling of 154642644 in words is "one hundred fifty-four million, six hundred forty-two thousand, six hundred forty-four".