634413155 has 4 divisors (see below), whose sum is σ = 761295792. Its totient is φ = 507530520.

The previous prime is 634413139. The next prime is 634413179. The reversal of 634413155 is 551314436.

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

It is not a de Polignac number, because 634413155 - 2⁴ = 634413139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63441311 + ... + 63441320.

It is an arithmetic number, because the mean of its divisors is an integer number (190323948).

Almost surely, 2^634413155 is an apocalyptic number.

634413155 is a deficient number, since it is larger than the sum of its proper divisors (126882637).

634413155 is a wasteful number, since it uses less digits than its factorization.

634413155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126882636.

The product of its digits is 21600, while the sum is 32.

The square root of 634413155 is about 25187.5595284656. The cubic root of 634413155 is about 859.2589411181.

The spelling of 634413155 in words is "six hundred thirty-four million, four hundred thirteen thousand, one hundred fifty-five".