78486268487 has 12 divisors (see below), whose sum is σ = 86283255240. Its totient is φ = 71340215760.

The previous prime is 78486268459. The next prime is 78486268493.

78486268487 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78486268487 - 2¹⁸ = 78486006343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78486268087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803093 + ... + 895505.

It is an arithmetic number, because the mean of its divisors is an integer number (7190271270).

Almost surely, 2^78486268487 is an apocalyptic number.

78486268487 is a deficient number, since it is larger than the sum of its proper divisors (7796986753).

78486268487 is a wasteful number, since it uses less digits than its factorization.

78486268487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99454 (or 99443 counting only the distinct ones).

The product of its digits is 231211008, while the sum is 68.

The spelling of 78486268487 in words is "seventy-eight billion, four hundred eighty-six million, two hundred sixty-eight thousand, four hundred eighty-seven".