51661183410 has 192 divisors, whose sum is σ = 139640941440. Its totient is φ = 13242700800.

The previous prime is 51661183403. The next prime is 51661183417. The reversal of 51661183410 is 1438116615.

It is a happy number.

51661183410 is a `hidden beast` number, since 5 + 1 + 6 + 61 + 183 + 410 = 666.

51661183410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51661183403) and next prime (51661183417).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51661183417) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 73696060 + ... + 73696760.

It is an arithmetic number, because the mean of its divisors is an integer number (727296570).

Almost surely, 2^51661183410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51661183410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69820470720).

51661183410 is an abundant number, since it is smaller than the sum of its proper divisors (87979758030).

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

51661183410 is a wasteful number, since it uses less digits than its factorization.

51661183410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 51661183410 in words is "fifty-one billion, six hundred sixty-one million, one hundred eighty-three thousand, four hundred ten".