8157543877 has 8 divisors (see below), whose sum is σ = 9342374400. Its totient is φ = 6977580144.

The previous prime is 8157543853. The next prime is 8157543881. The reversal of 8157543877 is 7783457518.

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 8157543877 - 2⁷ = 8157543749 is a prime.

It is a super-2 number, since 2×8157543877² (a number of 21 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 (8157547877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213102 + ... + 1219807.

It is an arithmetic number, because the mean of its divisors is an integer number (1167796800).

Almost surely, 2^8157543877 is an apocalyptic number.

It is an amenable number.

8157543877 is a deficient number, since it is larger than the sum of its proper divisors (1184830523).

8157543877 is a wasteful number, since it uses less digits than its factorization.

8157543877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433395.

The product of its digits is 6585600, while the sum is 55.

The square root of 8157543877 is about 90319.1224326277. The cubic root of 8157543877 is about 2013.0434062697.

The spelling of 8157543877 in words is "eight billion, one hundred fifty-seven million, five hundred forty-three thousand, eight hundred seventy-seven".