51254424642 has 16 divisors (see below), whose sum is σ = 102511980000. Its totient is φ = 17084286432.

The previous prime is 51254424593. The next prime is 51254424691. The reversal of 51254424642 is 24642445215.

It is an interprime number because it is at equal distance from previous prime (51254424593) and next prime (51254424691).

It is a self number, because there is not a number n which added to its sum of digits gives 51254424642.

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, 119109 + ... + 341607.

It is an arithmetic number, because the mean of its divisors is an integer number (6406998750).

Almost surely, 2^51254424642 is an apocalyptic number.

51254424642 is an abundant number, since it is smaller than the sum of its proper divisors (51257555358).

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

51254424642 is a wasteful number, since it uses less digits than its factorization.

51254424642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260897.

The product of its digits is 307200, while the sum is 39.

Adding to 51254424642 its reverse (24642445215), we get a palindrome (75896869857).

The spelling of 51254424642 in words is "fifty-one billion, two hundred fifty-four million, four hundred twenty-four thousand, six hundred forty-two".