51277716650 has 12 divisors (see below), whose sum is σ = 95376553062. Its totient is φ = 20511086640.

The previous prime is 51277716613. The next prime is 51277716653. The reversal of 51277716650 is 5661777215.

It can be written as a sum of positive squares in 3 ways, for example, as 38527016089 + 12750700561 = 196283^2 + 112919^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51277716595 and 51277716604.

It is not an unprimeable number, because it can be changed into a prime (51277716653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 512777117 + ... + 512777216.

Almost surely, 2^51277716650 is an apocalyptic number.

51277716650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51277716650 is a deficient number, since it is larger than the sum of its proper divisors (44098836412).

51277716650 is a wasteful number, since it uses less digits than its factorization.

51277716650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025554345 (or 1025554340 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 51277716650 in words is "fifty-one billion, two hundred seventy-seven million, seven hundred sixteen thousand, six hundred fifty".