51544019042 has 4 divisors (see below), whose sum is σ = 77316028566. Its totient is φ = 25772009520.

The previous prime is 51544018987. The next prime is 51544019047. The reversal of 51544019042 is 24091044515.

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., 42494111881 + 9049907161 = 206141^2 + 95131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51544018993 and 51544019011.

It is not an unprimeable number, because it can be changed into a prime (51544019047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12886004759 + ... + 12886004762.

Almost surely, 2^51544019042 is an apocalyptic number.

51544019042 is a deficient number, since it is larger than the sum of its proper divisors (25772009524).

51544019042 is a wasteful number, since it uses less digits than its factorization.

51544019042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25772009523.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 51544019042 in words is "fifty-one billion, five hundred forty-four million, nineteen thousand, forty-two".