78101157874 has 4 divisors (see below), whose sum is σ = 117151736814. Its totient is φ = 39050578936.

The previous prime is 78101157863. The next prime is 78101157889. The reversal of 78101157874 is 47875110187.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47875110187 = 79 ⋅606014053.

It can be written as a sum of positive squares in only one way, i.e., 75958116025 + 2143041849 = 275605^2 + 46293^2 .

It is a super-2 number, since 2×78101157874² (a number of 23 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 19525289467 + ... + 19525289470.

Almost surely, 2^78101157874 is an apocalyptic number.

78101157874 is a deficient number, since it is larger than the sum of its proper divisors (39050578940).

78101157874 is a wasteful number, since it uses less digits than its factorization.

78101157874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39050578939.

The product of its (nonzero) digits is 439040, while the sum is 49.

The spelling of 78101157874 in words is "seventy-eight billion, one hundred one million, one hundred fifty-seven thousand, eight hundred seventy-four".