78146067122 has 18 divisors (see below), whose sum is σ = 118604369079. Its totient is φ = 38616615840.

The previous prime is 78146067091. The next prime is 78146067133. The reversal of 78146067122 is 22176064187.

It can be written as a sum of positive squares in 5 ways, for example, as 27553012081 + 50593055041 = 165991^2 + 224929^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=197669.

It is a super-2 number, since 2×78146067122² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 35183972 + ... + 35186192.

Almost surely, 2^78146067122 is an apocalyptic number.

78146067122 is a deficient number, since it is larger than the sum of its proper divisors (40458301957).

78146067122 is an frugal number, since it uses more digits than its factorization.

78146067122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 78146067122 in words is "seventy-eight billion, one hundred forty-six million, sixty-seven thousand, one hundred twenty-two".