51001543164 has 192 divisors, whose sum is σ = 141786086400. Its totient is φ = 14065920000.

The previous prime is 51001543163. The next prime is 51001543169. The reversal of 51001543164 is 46134510015.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001543163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38607624 + ... + 38608944.

It is an arithmetic number, because the mean of its divisors is an integer number (738469200).

Almost surely, 2^51001543164 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 51001543164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70893043200).

51001543164 is an abundant number, since it is smaller than the sum of its proper divisors (90784543236).

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

51001543164 is a wasteful number, since it uses less digits than its factorization.

51001543164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 51001543164 in words is "fifty-one billion, one million, five hundred forty-three thousand, one hundred sixty-four".