51761162550 has 24 divisors (see below), whose sum is σ = 128367683496. Its totient is φ = 13802976640.

The previous prime is 51761162507. The next prime is 51761162591. The reversal of 51761162550 is 5526116715.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51761162499 and 51761162508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172537059 + ... + 172537358.

It is an arithmetic number, because the mean of its divisors is an integer number (5348653479).

Almost surely, 2^51761162550 is an apocalyptic number.

51761162550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51761162550 is an abundant number, since it is smaller than the sum of its proper divisors (76606520946).

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

51761162550 is a wasteful number, since it uses less digits than its factorization.

51761162550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345074432 (or 345074427 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 51761162550 in words is "fifty-one billion, seven hundred sixty-one million, one hundred sixty-two thousand, five hundred fifty".