78361016387 has 4 divisors (see below), whose sum is σ = 78639881496. Its totient is φ = 78082151280.

The previous prime is 78361016317. The next prime is 78361016431.

78361016387 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78361016387 - 2²⁰ = 78359967811 is a prime.

It is a super-2 number, since 2×78361016387² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78361016317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139432133 + ... + 139432694.

It is an arithmetic number, because the mean of its divisors is an integer number (19659970374).

Almost surely, 2^78361016387 is an apocalyptic number.

78361016387 is a deficient number, since it is larger than the sum of its proper divisors (278865109).

78361016387 is a wasteful number, since it uses less digits than its factorization.

78361016387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278865108.

The product of its (nonzero) digits is 1016064, while the sum is 50.

It can be divided in two parts, 783610 and 16387, that added together give a palindrome (799997).

The spelling of 78361016387 in words is "seventy-eight billion, three hundred sixty-one million, sixteen thousand, three hundred eighty-seven".