634382780560 has 40 divisors (see below), whose sum is σ = 1509240902400. Its totient is φ = 247851875712.

The previous prime is 634382780557. The next prime is 634382780617. The reversal of 634382780560 is 65087283436.

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

It is a super-2 number, since 2×634382780560² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634382780498 and 634382780507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92203360 + ... + 92210239.

It is an arithmetic number, because the mean of its divisors is an integer number (37731022560).

Almost surely, 2^634382780560 is an apocalyptic number.

It is an amenable number.

634382780560 is an abundant number, since it is smaller than the sum of its proper divisors (874858121840).

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

634382780560 is a wasteful number, since it uses less digits than its factorization.

634382780560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184413655 (or 184413649 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 634382780560 in words is "six hundred thirty-four billion, three hundred eighty-two million, seven hundred eighty thousand, five hundred sixty".