78801157 has 8 divisors (see below), whose sum is σ = 81958400. Its totient is φ = 75698064.

The previous prime is 78801133. The next prime is 78801161. The reversal of 78801157 is 75110887.

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

It is a cyclic number.

It is not a de Polignac number, because 78801157 - 2¹¹ = 78799109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78801127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10557 + ... + 16402.

It is an arithmetic number, because the mean of its divisors is an integer number (10244800).

Almost surely, 2^78801157 is an apocalyptic number.

It is an amenable number.

78801157 is a deficient number, since it is larger than the sum of its proper divisors (3157243).

78801157 is a wasteful number, since it uses less digits than its factorization.

78801157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27075.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 78801157 is about 8877.0015771092. The cubic root of 78801157 is about 428.7237387265.

The spelling of 78801157 in words is "seventy-eight million, eight hundred one thousand, one hundred fifty-seven".