4644178061 has 6 divisors (see below), whose sum is σ = 4690851786. Its totient is φ = 4597518000.

The previous prime is 4644178057. The next prime is 4644178081. The reversal of 4644178061 is 1608714464.

It can be written as a sum of positive squares in 3 ways, for example, as 1567368100 + 3076809961 = 39590^2 + 55469^2 .

It is not a de Polignac number, because 4644178061 - 2² = 4644178057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644178051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 681491 + ... + 688271.

It is an arithmetic number, because the mean of its divisors is an integer number (781808631).

Almost surely, 2^4644178061 is an apocalyptic number.

It is an amenable number.

4644178061 is a deficient number, since it is larger than the sum of its proper divisors (46673725).

4644178061 is an frugal number, since it uses more digits than its factorization.

4644178061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13663 (or 6882 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 4644178061 is about 68148.2065868208. The cubic root of 4644178061 is about 1668.4106529018.

The spelling of 4644178061 in words is "four billion, six hundred forty-four million, one hundred seventy-eight thousand, sixty-one".