51552411440 has 80 divisors (see below), whose sum is σ = 124053444000. Its totient is φ = 19900102656.

The previous prime is 51552411437. The next prime is 51552411467. The reversal of 51552411440 is 4411425515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×51552411440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51552411397 and 51552411406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6257564 + ... + 6265796.

It is an arithmetic number, because the mean of its divisors is an integer number (1550668050).

Almost surely, 2^51552411440 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 51552411440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62026722000).

51552411440 is an abundant number, since it is smaller than the sum of its proper divisors (72501032560).

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

51552411440 is a wasteful number, since it uses less digits than its factorization.

51552411440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10974 (or 10968 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 51552411440 its reverse (4411425515), we get a palindrome (55963836955).

The spelling of 51552411440 in words is "fifty-one billion, five hundred fifty-two million, four hundred eleven thousand, four hundred forty".