68517405 has 48 divisors (see below), whose sum is σ = 130987584. Its totient is φ = 32855040.

The previous prime is 68517373. The next prime is 68517431. The reversal of 68517405 is 50471586.

It is not a de Polignac number, because 68517405 - 2⁵ = 68517373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68517405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47302 + ... + 48728.

It is an arithmetic number, because the mean of its divisors is an integer number (2728908).

Almost surely, 2^68517405 is an apocalyptic number.

It is an amenable number.

68517405 is a deficient number, since it is larger than the sum of its proper divisors (62470179).

68517405 is a wasteful number, since it uses less digits than its factorization.

68517405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 68517405 is about 8277.5240863437. The cubic root of 68517405 is about 409.1981253659.

The spelling of 68517405 in words is "sixty-eight million, five hundred seventeen thousand, four hundred five".