634898857740 has 384 divisors, whose sum is σ = 2130873937920. Its totient is φ = 138184704000.

The previous prime is 634898857721. The next prime is 634898857777. The reversal of 634898857740 is 47758898436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 352524840 + ... + 352526640.

It is an arithmetic number, because the mean of its divisors is an integer number (5549150880).

Almost surely, 2^634898857740 is an apocalyptic number.

634898857740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634898857740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1065436968960).

634898857740 is an abundant number, since it is smaller than the sum of its proper divisors (1495975080180).

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

634898857740 is a wasteful number, since it uses less digits than its factorization.

634898857740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2231 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 69.

The spelling of 634898857740 in words is "six hundred thirty-four billion, eight hundred ninety-eight million, eight hundred fifty-seven thousand, seven hundred forty".