86772477785 has 24 divisors (see below), whose sum is σ = 125276498880. Its totient is φ = 56364554592.

The previous prime is 86772477773. The next prime is 86772477787. The reversal of 86772477785 is 58777427768.

It is not a de Polignac number, because 86772477785 - 2⁴ = 86772477769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86772477787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7590584 + ... + 7602006.

It is an arithmetic number, because the mean of its divisors is an integer number (5219854120).

Almost surely, 2^86772477785 is an apocalyptic number.

It is an amenable number.

86772477785 is a deficient number, since it is larger than the sum of its proper divisors (38504021095).

86772477785 is an frugal number, since it uses more digits than its factorization.

86772477785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22877 (or 11454 counting only the distinct ones).

The product of its digits is 258155520, while the sum is 68.

The spelling of 86772477785 in words is "eighty-six billion, seven hundred seventy-two million, four hundred seventy-seven thousand, seven hundred eighty-five".