51706861146154 has 4 divisors (see below), whose sum is σ = 77560291719234. Its totient is φ = 25853430573076.

The previous prime is 51706861146133. The next prime is 51706861146307. The reversal of 51706861146154 is 45164116860715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26740120077225 + 24966741068929 = 5171085^2 + 4996673^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51706861146095 and 51706861146104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12926715286537 + ... + 12926715286540.

Almost surely, 2^{51706861146154} is an apocalyptic number.

51706861146154 is a deficient number, since it is larger than the sum of its proper divisors (25853430573080).

51706861146154 is a wasteful number, since it uses less digits than its factorization.

51706861146154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25853430573079.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 51706861146154 in words is "fifty-one trillion, seven hundred six billion, eight hundred sixty-one million, one hundred forty-six thousand, one hundred fifty-four".