51664119192 has 448 divisors, whose sum is σ = 178902240000. Its totient is φ = 13650239232.

The previous prime is 51664119187. The next prime is 51664119197. The reversal of 51664119192 is 29191146615.

51664119192 is a `hidden beast` number, since 5 + 1 + 66 + 411 + 91 + 92 = 666.

51664119192 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 (51664119187) and next prime (51664119197).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51664119197) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 33352434 + ... + 33353982.

Almost surely, 2^51664119192 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 51664119192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89451120000).

51664119192 is an abundant number, since it is smaller than the sum of its proper divisors (127238120808).

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

51664119192 is a wasteful number, since it uses less digits than its factorization.

51664119192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1623 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The spelling of 51664119192 in words is "fifty-one billion, six hundred sixty-four million, one hundred nineteen thousand, one hundred ninety-two".