4661994138 has 16 divisors (see below), whose sum is σ = 9325592640. Its totient is φ = 1553730656.

The previous prime is 4661994097. The next prime is 4661994163. The reversal of 4661994138 is 8314991664.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 27270 + ... + 100337.

It is an arithmetic number, because the mean of its divisors is an integer number (582849540).

Almost surely, 2^4661994138 is an apocalyptic number.

4661994138 is an abundant number, since it is smaller than the sum of its proper divisors (4663598502).

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

4661994138 is a wasteful number, since it uses less digits than its factorization.

4661994138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133701.

The product of its digits is 1119744, while the sum is 51.

The square root of 4661994138 is about 68278.7971335172. The cubic root of 4661994138 is about 1670.5413925897.

The spelling of 4661994138 in words is "four billion, six hundred sixty-one million, nine hundred ninety-four thousand, one hundred thirty-eight".