86722759647 has 16 divisors (see below), whose sum is σ = 128667965280. Its totient is φ = 57729761856.

The previous prime is 86722759633. The next prime is 86722759661. The reversal of 86722759647 is 74695722768.

It is an interprime number because it is at equal distance from previous prime (86722759633) and next prime (86722759661).

It is not a de Polignac number, because 86722759647 - 2¹² = 86722755551 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86722759547) 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, 2353918 + ... + 2390475.

It is an arithmetic number, because the mean of its divisors is an integer number (8041747830).

Almost surely, 2^86722759647 is an apocalyptic number.

86722759647 is a deficient number, since it is larger than the sum of its proper divisors (41945205633).

86722759647 is a wasteful number, since it uses less digits than its factorization.

86722759647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745079 (or 4745073 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 63.

The spelling of 86722759647 in words is "eighty-six billion, seven hundred twenty-two million, seven hundred fifty-nine thousand, six hundred forty-seven".