51278100028 has 12 divisors (see below), whose sum is σ = 90192192552. Its totient is φ = 25508902160.

The previous prime is 51278099963. The next prime is 51278100103. The reversal of 51278100028 is 82000187215.

It is a junction number, because it is equal to n+sod(n) for n = 51278099966 and 51278100002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32536078 + ... + 32537653.

It is an arithmetic number, because the mean of its divisors is an integer number (7516016046).

Almost surely, 2^51278100028 is an apocalyptic number.

It is an amenable number.

51278100028 is a deficient number, since it is larger than the sum of its proper divisors (38914092524).

51278100028 is a wasteful number, since it uses less digits than its factorization.

51278100028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65073932 (or 65073930 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The spelling of 51278100028 in words is "fifty-one billion, two hundred seventy-eight million, one hundred thousand, twenty-eight".