78810010101 has 32 divisors (see below), whose sum is σ = 120112224000. Its totient is φ = 51034276800.

The previous prime is 78810010049. The next prime is 78810010177. The reversal of 78810010101 is 10101001887.

It is not a de Polignac number, because 78810010101 - 2⁷ = 78810009973 is a prime.

It is a super-2 number, since 2×78810010101² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78810010001) 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 31 ways as a sum of consecutive naturals, for example, 532551 + ... + 664251.

It is an arithmetic number, because the mean of its divisors is an integer number (3753507000).

Almost surely, 2^78810010101 is an apocalyptic number.

It is an amenable number.

78810010101 is a deficient number, since it is larger than the sum of its proper divisors (41302213899).

78810010101 is a wasteful number, since it uses less digits than its factorization.

78810010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132346 (or 132340 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 27.

Adding to 78810010101 its reverse (10101001887), we get a palindrome (88911011988).

The spelling of 78810010101 in words is "seventy-eight billion, eight hundred ten million, ten thousand, one hundred one".