8139280145 has 8 divisors (see below), whose sum is σ = 10341673704. Its totient is φ = 6128399104.

The previous prime is 8139280139. The next prime is 8139280169. The reversal of 8139280145 is 5410829318.

It can be written as a sum of positive squares in 4 ways, for example, as 201895681 + 7937384464 = 14209^2 + 89092^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8139280145 - 2⁴ = 8139280129 is a prime.

It is a Duffinian 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, 47878034 + ... + 47878203.

It is an arithmetic number, because the mean of its divisors is an integer number (1292709213).

Almost surely, 2^8139280145 is an apocalyptic number.

8139280145 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8139280145 is a deficient number, since it is larger than the sum of its proper divisors (2202393559).

8139280145 is a wasteful number, since it uses less digits than its factorization.

8139280145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95756259.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 8139280145 is about 90217.9591046040. The cubic root of 8139280145 is about 2011.5399652851.

The spelling of 8139280145 in words is "eight billion, one hundred thirty-nine million, two hundred eighty thousand, one hundred forty-five".