6378157 has 6 divisors (see below), whose sum is σ = 6591534. Its totient is φ = 6171480.

The previous prime is 6378139. The next prime is 6378181. The reversal of 6378157 is 7518736.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 2802276 = 1891^2 + 1674^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6378157 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 (6378137) 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 5 ways as a sum of consecutive naturals, for example, 2358 + ... + 4279.

It is an arithmetic number, because the mean of its divisors is an integer number (1098589).

Almost surely, 2^6378157 is an apocalyptic number.

It is an amenable number.

6378157 is a deficient number, since it is larger than the sum of its proper divisors (213377).

6378157 is an equidigital number, since it uses as much as digits as its factorization.

6378157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699 (or 6668 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 6378157 is about 2525.5013363687. The cubic root of 6378157 is about 185.4520912888.

The spelling of 6378157 in words is "six million, three hundred seventy-eight thousand, one hundred fifty-seven".