634870094640 has 40 divisors (see below), whose sum is σ = 1968097294128. Its totient is φ = 169298691840.

The previous prime is 634870094623. The next prime is 634870094653. The reversal of 634870094640 is 46490078436.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×634870094640³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322645791 + ... + 1322646270.

Almost surely, 2^634870094640 is an apocalyptic number.

634870094640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634870094640 is an abundant number, since it is smaller than the sum of its proper divisors (1333227199488).

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

634870094640 is a wasteful number, since it uses less digits than its factorization.

634870094640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645292077 (or 2645292071 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 634870094640 in words is "six hundred thirty-four billion, eight hundred seventy million, ninety-four thousand, six hundred forty".