51611647050 has 72 divisors (see below), whose sum is σ = 141613632576. Its totient is φ = 13470268320.

The previous prime is 51611647027. The next prime is 51611647067. The reversal of 51611647050 is 5074611615.

It is a happy number.

51611647050 is a `hidden beast` number, since 5 + 1 + 6 + 1 + 1 + 647 + 0 + 5 + 0 = 666.

It is a super-2 number, since 2×51611647050² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51611646996 and 51611647014.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1198984 + ... + 1241283.

It is an arithmetic number, because the mean of its divisors is an integer number (1966856008).

Almost surely, 2^51611647050 is an apocalyptic number.

51611647050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51611647050 is an abundant number, since it is smaller than the sum of its proper divisors (90001985526).

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

51611647050 is a wasteful number, since it uses less digits than its factorization.

51611647050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440332 (or 2440324 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 51611647050 in words is "fifty-one billion, six hundred eleven million, six hundred forty-seven thousand, fifty".