68861889745 has 32 divisors (see below), whose sum is σ = 90531302400. Its totient is φ = 49868010240.

The previous prime is 68861889743. The next prime is 68861889751. The reversal of 68861889745 is 54798816886.

It is not a de Polignac number, because 68861889745 - 2¹ = 68861889743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68861889743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16563207 + ... + 16567363.

It is an arithmetic number, because the mean of its divisors is an integer number (2829103200).

Almost surely, 2^68861889745 is an apocalyptic number.

It is an amenable number.

68861889745 is a deficient number, since it is larger than the sum of its proper divisors (21669412655).

68861889745 is a wasteful number, since it uses less digits than its factorization.

68861889745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385.

The product of its digits is 185794560, while the sum is 70.

The spelling of 68861889745 in words is "sixty-eight billion, eight hundred sixty-one million, eight hundred eighty-nine thousand, seven hundred forty-five".