51778673544 has 64 divisors (see below), whose sum is σ = 139452949440. Its totient is φ = 15926319360.

The previous prime is 51778673519. The next prime is 51778673563. The reversal of 51778673544 is 44537687715.

It is a super-2 number, since 2×51778673544² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911874 + ... + 966990.

It is an arithmetic number, because the mean of its divisors is an integer number (2178952335).

Almost surely, 2^51778673544 is an apocalyptic number.

It is an amenable number.

51778673544 is an abundant number, since it is smaller than the sum of its proper divisors (87674275896).

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

51778673544 is a wasteful number, since it uses less digits than its factorization.

51778673544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58150 (or 58146 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 57.

The spelling of 51778673544 in words is "fifty-one billion, seven hundred seventy-eight million, six hundred seventy-three thousand, five hundred forty-four".