636486166432 has 192 divisors, whose sum is σ = 1348648164864. Its totient is φ = 295044710400.

The previous prime is 636486166429. The next prime is 636486166469. The reversal of 636486166432 is 234661684636.

It is a super-2 number, since 2×636486166432² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742690548 + ... + 742691404.

It is an arithmetic number, because the mean of its divisors is an integer number (7024209192).

Almost surely, 2^636486166432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636486166432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674324082432).

636486166432 is an abundant number, since it is smaller than the sum of its proper divisors (712161998432).

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

636486166432 is a wasteful number, since it uses less digits than its factorization.

636486166432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1183 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 55.

The spelling of 636486166432 in words is "six hundred thirty-six billion, four hundred eighty-six million, one hundred sixty-six thousand, four hundred thirty-two".