78612611621687 has 8 divisors (see below), whose sum is σ = 92356075192080. Its totient is φ = 65968625136960.

The previous prime is 78612611621669. The next prime is 78612611621707.

78612611621687 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78612611621687 - 2²⁴ = 78612594844471 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 (78612611621657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274869271262 + ... + 274869271547.

It is an arithmetic number, because the mean of its divisors is an integer number (11544509399010).

Almost surely, 2^{78612611621687} is an apocalyptic number.

78612611621687 is a deficient number, since it is larger than the sum of its proper divisors (13743463570393).

78612611621687 is a wasteful number, since it uses less digits than its factorization.

78612611621687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549738542833.

The product of its digits is 16257024, while the sum is 62.

The spelling of 78612611621687 in words is "seventy-eight trillion, six hundred twelve billion, six hundred eleven million, six hundred twenty-one thousand, six hundred eighty-seven".