30139261865 has 16 divisors (see below), whose sum is σ = 37178837328. Its totient is φ = 23438128896.

The previous prime is 30139261849. The next prime is 30139261891. The reversal of 30139261865 is 56816293103.

It can be written as a sum of positive squares in 8 ways, for example, as 2582265856 + 27556996009 = 50816^2 + 166003^2 .

It is a cyclic number.

It is not a de Polignac number, because 30139261865 - 2⁴ = 30139261849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127679 + ... + 276731.

It is an arithmetic number, because the mean of its divisors is an integer number (2323677333).

Almost surely, 2^30139261865 is an apocalyptic number.

It is an amenable number.

30139261865 is a deficient number, since it is larger than the sum of its proper divisors (7039575463).

30139261865 is a wasteful number, since it uses less digits than its factorization.

30139261865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150188.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 30139261865 in words is "thirty billion, one hundred thirty-nine million, two hundred sixty-one thousand, eight hundred sixty-five".