634008781406 has 32 divisors (see below), whose sum is σ = 1276884822528. Its totient is φ = 228015145440.

The previous prime is 634008781403. The next prime is 634008781409. The reversal of 634008781406 is 604187800436.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (634008781403) and next prime (634008781409).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634008781403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158341850 + ... + 158345853.

It is an arithmetic number, because the mean of its divisors is an integer number (39902650704).

Almost surely, 2^634008781406 is an apocalyptic number.

634008781406 is an abundant number, since it is smaller than the sum of its proper divisors (642876041122).

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

634008781406 is a wasteful number, since it uses less digits than its factorization.

634008781406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316687736.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 634008781406 in words is "six hundred thirty-four billion, eight million, seven hundred eighty-one thousand, four hundred six".