689777785077 has 16 divisors (see below), whose sum is σ = 941179990080. Its totient is φ = 449115714432.

The previous prime is 689777785061. The next prime is 689777785079. The reversal of 689777785077 is 770587777986.

It is not a de Polignac number, because 689777785077 - 2⁴ = 689777785061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689777784993 and 689777785011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689777785079) 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, 1169449 + ... + 1657457.

It is an arithmetic number, because the mean of its divisors is an integer number (58823749380).

Almost surely, 2^689777785077 is an apocalyptic number.

It is an amenable number.

689777785077 is a deficient number, since it is larger than the sum of its proper divisors (251402205003).

689777785077 is a wasteful number, since it uses less digits than its factorization.

689777785077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499012.

The product of its (nonzero) digits is 2032974720, while the sum is 78.

The spelling of 689777785077 in words is "six hundred eighty-nine billion, seven hundred seventy-seven million, seven hundred eighty-five thousand, seventy-seven".