51121641452 has 48 divisors (see below), whose sum is σ = 107933280000. Its totient is φ = 20696606784.

The previous prime is 51121641419. The next prime is 51121641457. The reversal of 51121641452 is 25414612115.

It is a happy number.

It is a super-2 number, since 2×51121641452² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51121641457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47999 + ... + 323337.

It is an arithmetic number, because the mean of its divisors is an integer number (2248610000).

Almost surely, 2^51121641452 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 51121641452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53966640000).

51121641452 is an abundant number, since it is smaller than the sum of its proper divisors (56811638548).

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

51121641452 is a wasteful number, since it uses less digits than its factorization.

51121641452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275718 (or 275716 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The spelling of 51121641452 in words is "fifty-one billion, one hundred twenty-one million, six hundred forty-one thousand, four hundred fifty-two".