51778673562 has 96 divisors (see below), whose sum is σ = 130888751616. Its totient is φ = 13366283040.

The previous prime is 51778673519. The next prime is 51778673563. The reversal of 51778673562 is 26537687715.

It is not an unprimeable number, because it can be changed into a prime (51778673563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 797113 + ... + 859619.

It is an arithmetic number, because the mean of its divisors is an integer number (1363424496).

Almost surely, 2^51778673562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51778673562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65444375808).

51778673562 is an abundant number, since it is smaller than the sum of its proper divisors (79110078054).

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

51778673562 is a wasteful number, since it uses less digits than its factorization.

51778673562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62704 (or 62693 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 57.

The spelling of 51778673562 in words is "fifty-one billion, seven hundred seventy-eight million, six hundred seventy-three thousand, five hundred sixty-two".