78287914661 has 8 divisors (see below), whose sum is σ = 85970595648. Its totient is φ = 70699500000.

The previous prime is 78287914637. The next prime is 78287914669. The reversal of 78287914661 is 16641978287.

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

It is a cyclic number.

It is not a de Polignac number, because 78287914661 - 2¹⁰ = 78287913637 is a prime.

It is a super-2 number, since 2×78287914661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78287914661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78287914669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23564840 + ... + 23568161.

It is an arithmetic number, because the mean of its divisors is an integer number (10746324456).

Almost surely, 2^78287914661 is an apocalyptic number.

It is an amenable number.

78287914661 is a deficient number, since it is larger than the sum of its proper divisors (7682680987).

78287914661 is a wasteful number, since it uses less digits than its factorization.

78287914661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47133163.

The product of its digits is 8128512, while the sum is 59.

The spelling of 78287914661 in words is "seventy-eight billion, two hundred eighty-seven million, nine hundred fourteen thousand, six hundred sixty-one".