86657768451 has 6 divisors (see below), whose sum is σ = 125172332220. Its totient is φ = 57771845628.

The previous prime is 86657768423. The next prime is 86657768459. The reversal of 86657768451 is 15486775668.

86657768451 is a `hidden beast` number, since 8 + 6 + 6 + 577 + 6 + 8 + 4 + 51 = 666.

It is not a de Polignac number, because 86657768451 - 2²¹ = 86655671299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86657768459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4814320461 + ... + 4814320478.

It is an arithmetic number, because the mean of its divisors is an integer number (20862055370).

Almost surely, 2^86657768451 is an apocalyptic number.

86657768451 is a deficient number, since it is larger than the sum of its proper divisors (38514563769).

86657768451 is a wasteful number, since it uses less digits than its factorization.

86657768451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9628640945 (or 9628640942 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

It can be divided in two parts, 866577 and 68451, that added together give a triangular number (935028 = T₁₃₆₇).

The spelling of 86657768451 in words is "eighty-six billion, six hundred fifty-seven million, seven hundred sixty-eight thousand, four hundred fifty-one".