51725749654 has 4 divisors (see below), whose sum is σ = 77588624484. Its totient is φ = 25862874826.

The previous prime is 51725749627. The next prime is 51725749679. The reversal of 51725749654 is 45694752715.

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

It is a super-2 number, since 2×51725749654² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51725749595 and 51725749604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12931437412 + ... + 12931437415.

It is an arithmetic number, because the mean of its divisors is an integer number (19397156121).

Almost surely, 2^51725749654 is an apocalyptic number.

51725749654 is a deficient number, since it is larger than the sum of its proper divisors (25862874830).

51725749654 is a wasteful number, since it uses less digits than its factorization.

51725749654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862874829.

The product of its digits is 10584000, while the sum is 55.

The spelling of 51725749654 in words is "fifty-one billion, seven hundred twenty-five million, seven hundred forty-nine thousand, six hundred fifty-four".