618632136 has 48 divisors (see below), whose sum is σ = 1676607660. Its totient is φ = 206069760.

The previous prime is 618632129. The next prime is 618632137. The reversal of 618632136 is 631236816.

618632136 is a `hidden beast` number, since 6 + 1 + 8 + 632 + 13 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 609596100 + 9036036 = 24690^2 + 3006^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 618632136.

It is not an unprimeable number, because it can be changed into a prime (618632137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196656 + ... + 199776.

Almost surely, 2^618632136 is an apocalyptic number.

It is an amenable number.

618632136 is an abundant number, since it is smaller than the sum of its proper divisors (1057975524).

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

618632136 is a wasteful number, since it uses less digits than its factorization.

618632136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5886 (or 5879 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 618632136 is about 24872.3166592901. The cubic root of 618632136 is about 852.0743504513.

The spelling of 618632136 in words is "six hundred eighteen million, six hundred thirty-two thousand, one hundred thirty-six".