634646154 has 16 divisors (see below), whose sum is σ = 1270237248. Its totient is φ = 211391232.

The previous prime is 634646149. The next prime is 634646161. The reversal of 634646154 is 451646436.

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 in 7 ways as a sum of consecutive naturals, for example, 30487 + ... + 46890.

It is an arithmetic number, because the mean of its divisors is an integer number (79389828).

Almost surely, 2^634646154 is an apocalyptic number.

634646154 is an abundant number, since it is smaller than the sum of its proper divisors (635591094).

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

634646154 is a wasteful number, since it uses less digits than its factorization.

634646154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78749.

The product of its digits is 207360, while the sum is 39.

The square root of 634646154 is about 25192.1843832566. The cubic root of 634646154 is about 859.3641207200.

The spelling of 634646154 in words is "six hundred thirty-four million, six hundred forty-six thousand, one hundred fifty-four".