51161564630652 has 288 divisors, whose sum is σ = 141124750577664. Its totient is φ = 14130401218560.

The previous prime is 51161564630647. The next prime is 51161564630677. The reversal of 51161564630652 is 25603646516115.

It is a junction number, because it is equal to n+sod(n) for n = 51161564630595 and 51161564630604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11742381258 + ... + 11742385614.

Almost surely, 2^{51161564630652} 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 51161564630652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70562375288832).

51161564630652 is an abundant number, since it is smaller than the sum of its proper divisors (89963185947012).

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

51161564630652 is a wasteful number, since it uses less digits than its factorization.

51161564630652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197 (or 5154 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 51161564630652 in words is "fifty-one trillion, one hundred sixty-one billion, five hundred sixty-four million, six hundred thirty thousand, six hundred fifty-two".