68870187977 has 16 divisors (see below), whose sum is σ = 75582471168. Its totient is φ = 62547925440.

The previous prime is 68870187973. The next prime is 68870188067. The reversal of 68870187977 is 77978107886.

It is a cyclic number.

It is not a de Polignac number, because 68870187977 - 2² = 68870187973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68870187973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873458 + ... + 949035.

It is an arithmetic number, because the mean of its divisors is an integer number (4723904448).

Almost surely, 2^68870187977 is an apocalyptic number.

It is an amenable number.

68870187977 is a deficient number, since it is larger than the sum of its proper divisors (6712283191).

68870187977 is a wasteful number, since it uses less digits than its factorization.

68870187977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822600.

The product of its (nonzero) digits is 66382848, while the sum is 68.

The spelling of 68870187977 in words is "sixty-eight billion, eight hundred seventy million, one hundred eighty-seven thousand, nine hundred seventy-seven".