8157554509 has 16 divisors (see below), whose sum is σ = 9182178432. Its totient is φ = 7190745408.

The previous prime is 8157554491. The next prime is 8157554527. The reversal of 8157554509 is 9054557518.

It is an interprime number because it is at equal distance from previous prime (8157554491) and next prime (8157554527).

It is a cyclic number.

It is not a de Polignac number, because 8157554509 - 2⁹ = 8157553997 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 (8157554549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161034 + ... + 205540.

It is an arithmetic number, because the mean of its divisors is an integer number (573886152).

Almost surely, 2^8157554509 is an apocalyptic number.

It is an amenable number.

8157554509 is a deficient number, since it is larger than the sum of its proper divisors (1024623923).

8157554509 is a wasteful number, since it uses less digits than its factorization.

8157554509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45156.

The product of its (nonzero) digits is 1260000, while the sum is 49.

The square root of 8157554509 is about 90319.1812905764. The cubic root of 8157554509 is about 2013.0442808250.

The spelling of 8157554509 in words is "eight billion, one hundred fifty-seven million, five hundred fifty-four thousand, five hundred nine".