52215661650 has 24 divisors (see below), whose sum is σ = 129494841264. Its totient is φ = 13924176400.

The previous prime is 52215661621. The next prime is 52215661651. The reversal of 52215661650 is 5616651225.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 52215661599 and 52215661608.

It is not an unprimeable number, because it can be changed into a prime (52215661651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174052056 + ... + 174052355.

It is an arithmetic number, because the mean of its divisors is an integer number (5395618386).

Almost surely, 2^52215661650 is an apocalyptic number.

52215661650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

52215661650 is an abundant number, since it is smaller than the sum of its proper divisors (77279179614).

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

52215661650 is a wasteful number, since it uses less digits than its factorization.

52215661650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348104426 (or 348104421 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 52215661650 in words is "fifty-two billion, two hundred fifteen million, six hundred sixty-one thousand, six hundred fifty".