51361272416 has 48 divisors (see below), whose sum is σ = 107027771760. Its totient is φ = 24194557440.

The previous prime is 51361272323. The next prime is 51361272467. The reversal of 51361272416 is 61427216315.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 51361272416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123311 + ... + 343406.

It is an arithmetic number, because the mean of its divisors is an integer number (2229745245).

Almost surely, 2^51361272416 is an apocalyptic number.

It is an amenable number.

51361272416 is an abundant number, since it is smaller than the sum of its proper divisors (55666499344).

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

51361272416 is a wasteful number, since it uses less digits than its factorization.

51361272416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466927 (or 466919 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The spelling of 51361272416 in words is "fifty-one billion, three hundred sixty-one million, two hundred seventy-two thousand, four hundred sixteen".