634776441091 has 4 divisors (see below), whose sum is σ = 683605398112. Its totient is φ = 585947484072.

The previous prime is 634776441083. The next prime is 634776441109. The reversal of 634776441091 is 190144677436.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 634776441091 - 2³ = 634776441083 is a prime.

It is a super-2 number, since 2×634776441091² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (634776441041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24414478491 + ... + 24414478516.

It is an arithmetic number, because the mean of its divisors is an integer number (170901349528).

Almost surely, 2^634776441091 is an apocalyptic number.

634776441091 is a deficient number, since it is larger than the sum of its proper divisors (48828957021).

634776441091 is a wasteful number, since it uses less digits than its factorization.

634776441091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48828957020.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 634776441091 in words is "six hundred thirty-four billion, seven hundred seventy-six million, four hundred forty-one thousand, ninety-one".