49661819136 has 216 divisors, whose sum is σ = 148213089024. Its totient is φ = 15979991040.

The previous prime is 49661819117. The next prime is 49661819147. The reversal of 49661819136 is 63191816694.

It is a happy number.

49661819136 is a `hidden beast` number, since 4 + 9 + 6 + 618 + 1 + 9 + 13 + 6 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11165265 + ... + 11169711.

Almost surely, 2^49661819136 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 49661819136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74106544512).

49661819136 is an abundant number, since it is smaller than the sum of its proper divisors (98551269888).

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

49661819136 is a wasteful number, since it uses less digits than its factorization.

49661819136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637 (or 4620 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 49661819136 in words is "forty-nine billion, six hundred sixty-one million, eight hundred nineteen thousand, one hundred thirty-six".