634779134850 has 384 divisors, whose sum is σ = 1918805760000. Its totient is φ = 135656847360.

The previous prime is 634779134839. The next prime is 634779134863. The reversal of 634779134850 is 58431977436.

634779134850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 532085854 + ... + 532087046.

It is an arithmetic number, because the mean of its divisors is an integer number (4996890000).

Almost surely, 2^634779134850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634779134850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959402880000).

634779134850 is an abundant number, since it is smaller than the sum of its proper divisors (1284026625150).

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

634779134850 is a wasteful number, since it uses less digits than its factorization.

634779134850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 634779134850 in words is "six hundred thirty-four billion, seven hundred seventy-nine million, one hundred thirty-four thousand, eight hundred fifty".