68715945 has 40 divisors (see below), whose sum is σ = 123780096. Its totient is φ = 36470304.

The previous prime is 68715923. The next prime is 68715953. The reversal of 68715945 is 54951786.

It is not a de Polignac number, because 68715945 - 2²¹ = 66618793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68715945.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 154894 + ... + 155336.

Almost surely, 2^68715945 is an apocalyptic number.

It is an amenable number.

68715945 is a deficient number, since it is larger than the sum of its proper divisors (55064151).

68715945 is a wasteful number, since it uses less digits than its factorization.

68715945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 834 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 68715945 is about 8289.5081277480. The cubic root of 68715945 is about 409.5929829508.

The spelling of 68715945 in words is "sixty-eight million, seven hundred fifteen thousand, nine hundred forty-five".