78641276881 has 8 divisors (see below), whose sum is σ = 80131057920. Its totient is φ = 77151717552.

The previous prime is 78641276863. The next prime is 78641276899. The reversal of 78641276881 is 18867214687.

It is an interprime number because it is at equal distance from previous prime (78641276863) and next prime (78641276899).

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

It is a de Polignac number, because none of the positive numbers 2^k-78641276881 is a prime.

It is a super-2 number, since 2×78641276881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78641276801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778290 + ... + 873508.

It is an arithmetic number, because the mean of its divisors is an integer number (10016382240).

Almost surely, 2^78641276881 is an apocalyptic number.

It is an amenable number.

78641276881 is a deficient number, since it is larger than the sum of its proper divisors (1489781039).

78641276881 is a wasteful number, since it uses less digits than its factorization.

78641276881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110855.

The product of its digits is 7225344, while the sum is 58.

The spelling of 78641276881 in words is "seventy-eight billion, six hundred forty-one million, two hundred seventy-six thousand, eight hundred eighty-one".