7657238487 has 4 divisors (see below), whose sum is σ = 10209651320. Its totient is φ = 5104825656.

The previous prime is 7657238473. The next prime is 7657238489. The reversal of 7657238487 is 7848327567.

It is a happy number.

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

It is not a de Polignac number, because 7657238487 - 2⁴ = 7657238471 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 (7657238489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276206412 + ... + 1276206417.

It is an arithmetic number, because the mean of its divisors is an integer number (2552412830).

Almost surely, 2^7657238487 is an apocalyptic number.

7657238487 is a deficient number, since it is larger than the sum of its proper divisors (2552412833).

7657238487 is a wasteful number, since it uses less digits than its factorization.

7657238487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552412832.

The product of its digits is 15805440, while the sum is 57.

The square root of 7657238487 is about 87505.6483148374. The cubic root of 7657238487 is about 1971.0186085653.

The spelling of 7657238487 in words is "seven billion, six hundred fifty-seven million, two hundred thirty-eight thousand, four hundred eighty-seven".