8043257685 has 32 divisors (see below), whose sum is σ = 13634531712. Its totient is φ = 4034938880.

The previous prime is 8043257681. The next prime is 8043257689. The reversal of 8043257685 is 5867523408.

It is an interprime number because it is at equal distance from previous prime (8043257681) and next prime (8043257689).

It is not a de Polignac number, because 8043257685 - 2² = 8043257681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8043257681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453097 + ... + 470513.

It is an arithmetic number, because the mean of its divisors is an integer number (426079116).

Almost surely, 2^8043257685 is an apocalyptic number.

8043257685 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8043257685 is a deficient number, since it is larger than the sum of its proper divisors (5591274027).

8043257685 is a wasteful number, since it uses less digits than its factorization.

8043257685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19253.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The square root of 8043257685 is about 89684.2109013621. The cubic root of 8043257685 is about 2003.5983292142.

The spelling of 8043257685 in words is "eight billion, forty-three million, two hundred fifty-seven thousand, six hundred eighty-five".