8149155840 has 360 divisors, whose sum is σ = 32305640640. Its totient is φ = 1861484544.

The previous prime is 8149155827. The next prime is 8149155851. The reversal of 8149155840 is 485519418.

It is a happy number.

8149155840 is a `hidden beast` number, since 8 + 1 + 4 + 91 + 558 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×8149155840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5160171 + ... + 5161749.

Almost surely, 2^8149155840 is an apocalyptic number.

8149155840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8149155840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16152820320).

8149155840 is an abundant number, since it is smaller than the sum of its proper divisors (24156484800).

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

8149155840 is a wasteful number, since it uses less digits than its factorization.

8149155840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 8149155840 is about 90272.6749354421. The cubic root of 8149155840 is about 2012.3531955206.

The spelling of 8149155840 in words is "eight billion, one hundred forty-nine million, one hundred fifty-five thousand, eight hundred forty".