1646042154 has 32 divisors (see below), whose sum is σ = 3409122816. Its totient is φ = 529287360.

The previous prime is 1646042141. The next prime is 1646042159. The reversal of 1646042154 is 4512406461.

It is not an unprimeable number, because it can be changed into a prime (1646042159) 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 15 ways as a sum of consecutive naturals, for example, 45004 + ... + 72920.

It is an arithmetic number, because the mean of its divisors is an integer number (106535088).

Almost surely, 2^1646042154 is an apocalyptic number.

1646042154 is an abundant number, since it is smaller than the sum of its proper divisors (1763080662).

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

1646042154 is a wasteful number, since it uses less digits than its factorization.

1646042154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28270.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1646042154 is about 40571.4450568377. The cubic root of 1646042154 is about 1180.7201756189.

The spelling of 1646042154 in words is "one billion, six hundred forty-six million, forty-two thousand, one hundred fifty-four".