78479688697487 has 32 divisors (see below), whose sum is σ = 98100532992000. Its totient is φ = 60993381477600.

The previous prime is 78479688697481. The next prime is 78479688697489.

78479688697487 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78479688697487 - 2³² = 78475393730191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78479688697393 and 78479688697402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78479688697481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44846264 + ... + 46563362.

It is an arithmetic number, because the mean of its divisors is an integer number (3065641656000).

Almost surely, 2^{78479688697487} is an apocalyptic number.

78479688697487 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78479688697487 is a deficient number, since it is larger than the sum of its proper divisors (19620844294513).

78479688697487 is a wasteful number, since it uses less digits than its factorization.

78479688697487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718667.

The product of its digits is 458838245376, while the sum is 98.

The spelling of 78479688697487 in words is "seventy-eight trillion, four hundred seventy-nine billion, six hundred eighty-eight million, six hundred ninety-seven thousand, four hundred eighty-seven".