635745949650 has 288 divisors, whose sum is σ = 1971992355840. Its totient is φ = 143836018560.

The previous prime is 635745949633. The next prime is 635745949687. The reversal of 635745949650 is 56949547536.

635745949650 is a `hidden beast` number, since 6 + 3 + 57 + 45 + 9 + 496 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 127991467 + ... + 127996433.

It is an arithmetic number, because the mean of its divisors is an integer number (6847195680).

Almost surely, 2^635745949650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635745949650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (985996177920).

635745949650 is an abundant number, since it is smaller than the sum of its proper divisors (1336246406190).

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

635745949650 is a wasteful number, since it uses less digits than its factorization.

635745949650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398 (or 5390 counting only the distinct ones).

The product of its (nonzero) digits is 122472000, while the sum is 63.

The spelling of 635745949650 in words is "six hundred thirty-five billion, seven hundred forty-five million, nine hundred forty-nine thousand, six hundred fifty".