6457087138 has 4 divisors (see below), whose sum is σ = 9685630710. Its totient is φ = 3228543568.

The previous prime is 6457087127. The next prime is 6457087141. The reversal of 6457087138 is 8317807546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6316593529 + 140493609 = 79477^2 + 11853^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6457087091 and 6457087100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1614271783 + ... + 1614271786.

Almost surely, 2^6457087138 is an apocalyptic number.

6457087138 is a deficient number, since it is larger than the sum of its proper divisors (3228543572).

6457087138 is a wasteful number, since it uses less digits than its factorization.

6457087138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228543571.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 6457087138 is about 80356.0025013689. The cubic root of 6457087138 is about 1862.1395137828.

The spelling of 6457087138 in words is "six billion, four hundred fifty-seven million, eighty-seven thousand, one hundred thirty-eight".