68521850 has 24 divisors (see below), whose sum is σ = 127930428. Its totient is φ = 27305600.

The previous prime is 68521819. The next prime is 68521877. The reversal of 68521850 is 5812586.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 22972849 + 45549001 = 4793^2 + 6749^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68521850.

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, 11612 + ... + 16488.

Almost surely, 2^68521850 is an apocalyptic number.

68521850 is a deficient number, since it is larger than the sum of its proper divisors (59408578).

68521850 is a wasteful number, since it uses less digits than its factorization.

68521850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 68521850 is about 8277.7925801508. The cubic root of 68521850 is about 409.2069739513.

The spelling of 68521850 in words is "sixty-eight million, five hundred twenty-one thousand, eight hundred fifty".