8149667440 has 40 divisors (see below), whose sum is σ = 19207551888. Its totient is φ = 3215208960.

The previous prime is 8149667437. The next prime is 8149667459. The reversal of 8149667440 is 447669418.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691906 + ... + 703585.

Almost surely, 2^8149667440 is an apocalyptic number.

8149667440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8149667440 is an abundant number, since it is smaller than the sum of its proper divisors (11057884448).

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

8149667440 is a wasteful number, since it uses less digits than its factorization.

8149667440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395577 (or 1395571 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 8149667440 is about 90275.5085280609. The cubic root of 8149667440 is about 2012.3953061544.

The spelling of 8149667440 in words is "eight billion, one hundred forty-nine million, six hundred sixty-seven thousand, four hundred forty".