2639154050849 has 4 divisors (see below), whose sum is σ = 2639185504560. Its totient is φ = 2639122597140.

The previous prime is 2639154050837. The next prime is 2639154050887. The reversal of 2639154050849 is 9480504519362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2639154050849 - 2⁴ = 2639154050833 is a prime.

It is a super-2 number, since 2×2639154050849² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2639154050794 and 2639154050803.

It is not an unprimeable number, because it can be changed into a prime (2639154053849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15600659 + ... + 15768920.

It is an arithmetic number, because the mean of its divisors is an integer number (659796376140).

Almost surely, 2^{2639154050849} is an apocalyptic number.

It is an amenable number.

2639154050849 is a deficient number, since it is larger than the sum of its proper divisors (31453711).

2639154050849 is an equidigital number, since it uses as much as digits as its factorization.

2639154050849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31453710.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 2639154050849 in words is "two trillion, six hundred thirty-nine billion, one hundred fifty-four million, fifty thousand, eight hundred forty-nine".