68351616 has 48 divisors (see below), whose sum is σ = 196692210. Its totient is φ = 22783488.

The previous prime is 68351593. The next prime is 68351623. The reversal of 68351616 is 61615386.

It is a happy number.

68351616 is a `hidden beast` number, since 6 + 8 + 35 + 1 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59351616 + 9000000 = 7704^2 + 3000^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×68351616² = 9343886819622912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28515 + ... + 30818.

Almost surely, 2^68351616 is an apocalyptic number.

It is an amenable number.

68351616 is an abundant number, since it is smaller than the sum of its proper divisors (128340594).

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

68351616 is a wasteful number, since it uses less digits than its factorization.

68351616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59353 (or 59338 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 68351616 is about 8267.5036135462. The cubic root of 68351616 is about 408.8678183499.

The spelling of 68351616 in words is "sixty-eight million, three hundred fifty-one thousand, six hundred sixteen".