51422491008 has 480 divisors, whose sum is σ = 179644227840. Its totient is φ = 14558164992.

The previous prime is 51422490989. The next prime is 51422491013. The reversal of 51422491008 is 80019422415.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 64519666 + ... + 64520462.

It is an arithmetic number, because the mean of its divisors is an integer number (374258808).

Almost surely, 2^51422491008 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 51422491008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89822113920).

51422491008 is an abundant number, since it is smaller than the sum of its proper divisors (128221736832).

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

51422491008 is a wasteful number, since it uses less digits than its factorization.

51422491008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 51422491008 in words is "fifty-one billion, four hundred twenty-two million, four hundred ninety-one thousand, eight".