76565550 has 48 divisors (see below), whose sum is σ = 190559232. Its totient is φ = 20344800.

The previous prime is 76565537. The next prime is 76565557. The reversal of 76565550 is 5556567.

It is a junction number, because it is equal to n+sod(n) for n = 76565499 and 76565508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76565557) 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, 51315 + ... + 52785.

It is an arithmetic number, because the mean of its divisors is an integer number (3969984).

Almost surely, 2^76565550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76565550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95279616).

76565550 is an abundant number, since it is smaller than the sum of its proper divisors (113993682).

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

76565550 is a wasteful number, since it uses less digits than its factorization.

76565550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 76565550 is about 8750.1742839786. The cubic root of 76565550 is about 424.6304515409.

The spelling of 76565550 in words is "seventy-six million, five hundred sixty-five thousand, five hundred fifty".