51688258954 has 4 divisors (see below), whose sum is σ = 77532388434. Its totient is φ = 25844129476.

The previous prime is 51688258949. The next prime is 51688258967. The reversal of 51688258954 is 45985288615.

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., 35515287025 + 16172971929 = 188455^2 + 127173^2 .

It is a super-2 number, since 2×51688258954² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51688258892 and 51688258901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12922064737 + ... + 12922064740.

Almost surely, 2^51688258954 is an apocalyptic number.

51688258954 is a deficient number, since it is larger than the sum of its proper divisors (25844129480).

51688258954 is a wasteful number, since it uses less digits than its factorization.

51688258954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25844129479.

The product of its digits is 27648000, while the sum is 61.

The spelling of 51688258954 in words is "fifty-one billion, six hundred eighty-eight million, two hundred fifty-eight thousand, nine hundred fifty-four".