51126749925 has 24 divisors (see below), whose sum is σ = 88978486560. Its totient is φ = 25832462400.

The previous prime is 51126749923. The next prime is 51126749959. The reversal of 51126749925 is 52994762115.

It is not a de Polignac number, because 51126749925 - 2¹ = 51126749923 is a prime.

It is a super-2 number, since 2×51126749925² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51126749923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17937786 + ... + 17940635.

It is an arithmetic number, because the mean of its divisors is an integer number (3707436940).

Almost surely, 2^51126749925 is an apocalyptic number.

It is an amenable number.

51126749925 is a deficient number, since it is larger than the sum of its proper divisors (37851736635).

51126749925 is a wasteful number, since it uses less digits than its factorization.

51126749925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35878453 (or 35878448 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The spelling of 51126749925 in words is "fifty-one billion, one hundred twenty-six million, seven hundred forty-nine thousand, nine hundred twenty-five".