68756405 has 16 divisors (see below), whose sum is σ = 84309120. Its totient is φ = 53815872.

The previous prime is 68756377. The next prime is 68756411. The reversal of 68756405 is 50465786.

68756405 = T₁₃₉₉ + T₁₄₀₀ + ... + T₁₄₆₅.

It is a cyclic number.

It is not a de Polignac number, because 68756405 - 2⁶ = 68756341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55331 + ... + 56559.

It is an arithmetic number, because the mean of its divisors is an integer number (5269320).

Almost surely, 2^68756405 is an apocalyptic number.

It is an amenable number.

68756405 is a deficient number, since it is larger than the sum of its proper divisors (15552715).

68756405 is a wasteful number, since it uses less digits than its factorization.

68756405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 68756405 is about 8291.9482029255. The cubic root of 68756405 is about 409.6733567301.

The spelling of 68756405 in words is "sixty-eight million, seven hundred fifty-six thousand, four hundred five".