68688550 has 48 divisors (see below), whose sum is σ = 146820960. Its totient is φ = 23420160.

The previous prime is 68688533. The next prime is 68688563. The reversal of 68688550 is 5588686.

It is a super-2 number, since 2×68688550² = 9436233802205000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68688550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79722 + ... + 80578.

It is an arithmetic number, because the mean of its divisors is an integer number (3058770).

Almost surely, 2^68688550 is an apocalyptic number.

68688550 is an abundant number, since it is smaller than the sum of its proper divisors (78132410).

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

68688550 is a wasteful number, since it uses less digits than its factorization.

68688550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The square root of 68688550 is about 8287.8555730659. The cubic root of 68688550 is about 409.5385448761.

The spelling of 68688550 in words is "sixty-eight million, six hundred eighty-eight thousand, five hundred fifty".