8154261640 has 32 divisors (see below), whose sum is σ = 20968102080. Its totient is φ = 2795746752.

The previous prime is 8154261593. The next prime is 8154261649. The reversal of 8154261640 is 461624518.

It is a self number, because there is not a number n which added to its sum of digits gives 8154261640.

It is not an unprimeable number, because it can be changed into a prime (8154261649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14560902 + ... + 14561461.

It is an arithmetic number, because the mean of its divisors is an integer number (655253190).

Almost surely, 2^8154261640 is an apocalyptic number.

It is an amenable number.

8154261640 is an abundant number, since it is smaller than the sum of its proper divisors (12813840440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8154261640 is a wasteful number, since it uses less digits than its factorization.

8154261640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29122381 (or 29122377 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 8154261640 is about 90300.9503825956. The cubic root of 8154261640 is about 2012.7733833311.

The spelling of 8154261640 in words is "eight billion, one hundred fifty-four million, two hundred sixty-one thousand, six hundred forty".