78120390195 has 32 divisors (see below), whose sum is σ = 138999575040. Its totient is φ = 41628543840.

The previous prime is 78120390151. The next prime is 78120390199. The reversal of 78120390195 is 59109302187.

78120390195 is a `hidden beast` number, since 78 + 1 + 2 + 0 + 390 + 195 = 666.

It is not a de Polignac number, because 78120390195 - 2¹³ = 78120382003 is a prime.

It is a super-2 number, since 2×78120390195² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78120390195.

It is not an unprimeable number, because it can be changed into a prime (78120390199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88999 + ... + 405168.

It is an arithmetic number, because the mean of its divisors is an integer number (4343736720).

Almost surely, 2^78120390195 is an apocalyptic number.

78120390195 is a deficient number, since it is larger than the sum of its proper divisors (60879184845).

78120390195 is a wasteful number, since it uses less digits than its factorization.

78120390195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495352 (or 495346 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 78120390195 in words is "seventy-eight billion, one hundred twenty million, three hundred ninety thousand, one hundred ninety-five".