78112122151 has 8 divisors (see below), whose sum is σ = 91448338464. Its totient is φ = 65320241280.

The previous prime is 78112122139. The next prime is 78112122163. The reversal of 78112122151 is 15122121187.

It is an interprime number because it is at equal distance from previous prime (78112122139) and next prime (78112122163).

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-78112122151 is a prime.

It is a super-2 number, since 2×78112122151² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78112122191) 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, 136083550 + ... + 136084123.

It is an arithmetic number, because the mean of its divisors is an integer number (11431042308).

Almost surely, 2^78112122151 is an apocalyptic number.

78112122151 is a deficient number, since it is larger than the sum of its proper divisors (13336216313).

78112122151 is a wasteful number, since it uses less digits than its factorization.

78112122151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272167721.

The product of its digits is 2240, while the sum is 31.

The spelling of 78112122151 in words is "seventy-eight billion, one hundred twelve million, one hundred twenty-two thousand, one hundred fifty-one".