78502048157 has 8 divisors (see below), whose sum is σ = 84550876536. Its totient is φ = 72454678272.

The previous prime is 78502048127. The next prime is 78502048159. The reversal of 78502048157 is 75184020587.

It can be written as a sum of positive squares in 4 ways, for example, as 6681264121 + 71820784036 = 81739^2 + 267994^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78502048157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78502048159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251528 + ... + 469329.

It is an arithmetic number, because the mean of its divisors is an integer number (10568859567).

Almost surely, 2^78502048157 is an apocalyptic number.

It is an amenable number.

78502048157 is a deficient number, since it is larger than the sum of its proper divisors (6048828379).

78502048157 is a wasteful number, since it uses less digits than its factorization.

78502048157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729247.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 78502048157 in words is "seventy-eight billion, five hundred two million, forty-eight thousand, one hundred fifty-seven".