635772550040 has 32 divisors (see below), whose sum is σ = 1505777094000. Its totient is φ = 240924334464.

The previous prime is 635772550033. The next prime is 635772550057. The reversal of 635772550040 is 40055277536.

It is a junction number, because it is equal to n+sod(n) for n = 635772549973 and 635772550000.

It is a congruent number.

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, 418270655 + ... + 418272174.

Almost surely, 2^635772550040 is an apocalyptic number.

It is an amenable number.

635772550040 is an abundant number, since it is smaller than the sum of its proper divisors (870004543960).

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

635772550040 is a wasteful number, since it uses less digits than its factorization.

635772550040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836542859 (or 836542855 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 44.

The spelling of 635772550040 in words is "six hundred thirty-five billion, seven hundred seventy-two million, five hundred fifty thousand, forty".