8264644157 has 16 divisors (see below), whose sum is σ = 10582461312. Its totient is φ = 6265926720.

The previous prime is 8264644153. The next prime is 8264644159. The reversal of 8264644157 is 7514464628.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8264644157 - 2² = 8264644153 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 (8264644151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447598 + ... + 1453295.

It is an arithmetic number, because the mean of its divisors is an integer number (661403832).

Almost surely, 2^8264644157 is an apocalyptic number.

It is an amenable number.

8264644157 is a deficient number, since it is larger than the sum of its proper divisors (2317817155).

8264644157 is a wasteful number, since it uses less digits than its factorization.

8264644157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900948.

The product of its digits is 1290240, while the sum is 47.

The square root of 8264644157 is about 90910.0883125740. The cubic root of 8264644157 is about 2021.8148703453.

The spelling of 8264644157 in words is "eight billion, two hundred sixty-four million, six hundred forty-four thousand, one hundred fifty-seven".