8234640657 has 8 divisors (see below), whose sum is σ = 12199467680. Its totient is φ = 5489760420.

The previous prime is 8234640637. The next prime is 8234640677. The reversal of 8234640657 is 7560464328.

8234640657 is a `hidden beast` number, since 8 + 234 + 6 + 406 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (8234640637) and next prime (8234640677).

It is not a de Polignac number, because 8234640657 - 2¹⁴ = 8234624273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8234640607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152493319 + ... + 152493372.

It is an arithmetic number, because the mean of its divisors is an integer number (1524933460).

Almost surely, 2^8234640657 is an apocalyptic number.

It is an amenable number.

8234640657 is a deficient number, since it is larger than the sum of its proper divisors (3964827023).

8234640657 is a wasteful number, since it uses less digits than its factorization.

8234640657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304986700 (or 304986694 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 8234640657 is about 90744.9208330692. The cubic root of 8234640657 is about 2019.3652759399.

The spelling of 8234640657 in words is "eight billion, two hundred thirty-four million, six hundred forty thousand, six hundred fifty-seven".