85778687758 has 4 divisors (see below), whose sum is σ = 128668031640. Its totient is φ = 42889343878.

The previous prime is 85778687747. The next prime is 85778687777.

85778687758 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21444671938 + ... + 21444671941.

It is an arithmetic number, because the mean of its divisors is an integer number (32167007910).

Almost surely, 2^85778687758 is an apocalyptic number.

85778687758 is a deficient number, since it is larger than the sum of its proper divisors (42889343882).

85778687758 is a wasteful number, since it uses less digits than its factorization.

85778687758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42889343881.

The product of its digits is 1475174400, while the sum is 76.

The spelling of 85778687758 in words is "eighty-five billion, seven hundred seventy-eight million, six hundred eighty-seven thousand, seven hundred fifty-eight".