51533476650 has 72 divisors (see below), whose sum is σ = 141399146304. Its totient is φ = 13449866400.

The previous prime is 51533476649. The next prime is 51533476651. The reversal of 51533476650 is 5667433515.

51533476650 is a `hidden beast` number, since 5 + 1 + 533 + 4 + 7 + 66 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (51533476649) and next prime (51533476651).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 51533476596 and 51533476605.

It is not an unprimeable number, because it can be changed into a prime (51533476651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1197136 + ... + 1239435.

It is an arithmetic number, because the mean of its divisors is an integer number (1963877032).

Almost surely, 2^51533476650 is an apocalyptic number.

51533476650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51533476650 is an abundant number, since it is smaller than the sum of its proper divisors (89865669654).

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

51533476650 is a wasteful number, since it uses less digits than its factorization.

51533476650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436636 (or 2436628 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 51533476650 in words is "fifty-one billion, five hundred thirty-three million, four hundred seventy-six thousand, six hundred fifty".