635520481572 has 24 divisors (see below), whose sum is σ = 1483191289216. Its totient is φ = 211795851168.

The previous prime is 635520481567. The next prime is 635520481577. The reversal of 635520481572 is 275184025536.

It is an interprime number because it is at equal distance from previous prime (635520481567) and next prime (635520481577).

It is not an unprimeable number, because it can be changed into a prime (635520481577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5478883 + ... + 5593674.

Almost surely, 2^635520481572 is an apocalyptic number.

It is an amenable number.

635520481572 is an abundant number, since it is smaller than the sum of its proper divisors (847670807644).

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

635520481572 is a wasteful number, since it uses less digits than its factorization.

635520481572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11077347 (or 11077345 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 635520481572 in words is "six hundred thirty-five billion, five hundred twenty million, four hundred eighty-one thousand, five hundred seventy-two".