85815976648 has 16 divisors (see below), whose sum is σ = 161984857500. Its totient is φ = 42620014656.

The previous prime is 85815976643. The next prime is 85815976657. The reversal of 85815976648 is 84667951858.

It can be written as a sum of positive squares in 2 ways, for example, as 73442084004 + 12373892644 = 271002^2 + 111238^2 .

It is not an unprimeable number, because it can be changed into a prime (85815976643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35995443 + ... + 35997826.

Almost surely, 2^85815976648 is an apocalyptic number.

It is an amenable number.

85815976648 is a deficient number, since it is larger than the sum of its proper divisors (76168880852).

85815976648 is a wasteful number, since it uses less digits than its factorization.

85815976648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71993424 (or 71993420 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 67.

The spelling of 85815976648 in words is "eighty-five billion, eight hundred fifteen million, nine hundred seventy-six thousand, six hundred forty-eight".