51366885478 has 16 divisors (see below), whose sum is σ = 77810893056. Its totient is φ = 25430001480.

The previous prime is 51366885469. The next prime is 51366885499. The reversal of 51366885478 is 87458866315.

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, 1570633 + ... + 1603003.

It is an arithmetic number, because the mean of its divisors is an integer number (4863180816).

Almost surely, 2^51366885478 is an apocalyptic number.

51366885478 is a deficient number, since it is larger than the sum of its proper divisors (26444007578).

51366885478 is a wasteful number, since it uses less digits than its factorization.

51366885478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40179.

The product of its digits is 38707200, while the sum is 61.

The spelling of 51366885478 in words is "fifty-one billion, three hundred sixty-six million, eight hundred eighty-five thousand, four hundred seventy-eight".