78157478835151 has 4 divisors (see below), whose sum is σ = 79324008370072. Its totient is φ = 76990949300232.

The previous prime is 78157478835133. The next prime is 78157478835181. The reversal of 78157478835151 is 15153887475187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78157478835151 - 2²⁷ = 78157344617423 is a prime.

It is a super-2 number, since 2×78157478835151² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78157478835181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583264767360 + ... + 583264767493.

It is an arithmetic number, because the mean of its divisors is an integer number (19831002092518).

Almost surely, 2^{78157478835151} is an apocalyptic number.

78157478835151 is a deficient number, since it is larger than the sum of its proper divisors (1166529534921).

78157478835151 is a wasteful number, since it uses less digits than its factorization.

78157478835151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166529534920.

The product of its digits is 263424000, while the sum is 70.

The spelling of 78157478835151 in words is "seventy-eight trillion, one hundred fifty-seven billion, four hundred seventy-eight million, eight hundred thirty-five thousand, one hundred fifty-one".