8156647453 has 4 divisors (see below), whose sum is σ = 8240736700. Its totient is φ = 8072558208.

The previous prime is 8156647451. The next prime is 8156647519. The reversal of 8156647453 is 3547466518.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1583005369 + 6573642084 = 39787^2 + 81078^2 .

It is a cyclic number.

It is not a de Polignac number, because 8156647453 - 2¹ = 8156647451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8156647397 and 8156647406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8156647451) 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, 42044478 + ... + 42044671.

It is an arithmetic number, because the mean of its divisors is an integer number (2060184175).

Almost surely, 2^8156647453 is an apocalyptic number.

It is an amenable number.

8156647453 is a deficient number, since it is larger than the sum of its proper divisors (84089247).

8156647453 is an equidigital number, since it uses as much as digits as its factorization.

8156647453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84089246.

The product of its digits is 2419200, while the sum is 49.

The square root of 8156647453 is about 90314.1597591430. The cubic root of 8156647453 is about 2012.9696664875.

The spelling of 8156647453 in words is "eight billion, one hundred fifty-six million, six hundred forty-seven thousand, four hundred fifty-three".