6858157387 has 4 divisors (see below), whose sum is σ = 6888911680. Its totient is φ = 6827403096.

The previous prime is 6858157381. The next prime is 6858157393. The reversal of 6858157387 is 7837518586.

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: 7837518586 = 2 ⋅3918759293.

It is an interprime number because it is at equal distance from previous prime (6858157381) and next prime (6858157393).

It is a cyclic number.

It is not a de Polignac number, because 6858157387 - 2¹⁵ = 6858124619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6858157381) 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 3 ways as a sum of consecutive naturals, for example, 15376812 + ... + 15377257.

It is an arithmetic number, because the mean of its divisors is an integer number (1722227920).

Almost surely, 2^6858157387 is an apocalyptic number.

6858157387 is a deficient number, since it is larger than the sum of its proper divisors (30754293).

6858157387 is a wasteful number, since it uses less digits than its factorization.

6858157387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30754292.

The product of its digits is 11289600, while the sum is 58.

The square root of 6858157387 is about 82813.9927005093. The cubic root of 6858157387 is about 1899.9221932127.

The spelling of 6858157387 in words is "six billion, eight hundred fifty-eight million, one hundred fifty-seven thousand, three hundred eighty-seven".