68911550 has 12 divisors (see below), whose sum is σ = 128175576. Its totient is φ = 27564600.

The previous prime is 68911547. The next prime is 68911553. The reversal of 68911550 is 5511986.

It is an interprime number because it is at equal distance from previous prime (68911547) and next prime (68911553).

It is a self number, because there is not a number n which added to its sum of digits gives 68911550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68911553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 689066 + ... + 689165.

It is an arithmetic number, because the mean of its divisors is an integer number (10681298).

Almost surely, 2^68911550 is an apocalyptic number.

68911550 is a deficient number, since it is larger than the sum of its proper divisors (59264026).

68911550 is a wasteful number, since it uses less digits than its factorization.

68911550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378243 (or 1378238 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 68911550 is about 8301.2980912626. The cubic root of 68911550 is about 409.9812602976.

The spelling of 68911550 in words is "sixty-eight million, nine hundred eleven thousand, five hundred fifty".