7898049155 has 4 divisors (see below), whose sum is σ = 9477658992. Its totient is φ = 6318439320.

The previous prime is 7898049151. The next prime is 7898049163. The reversal of 7898049155 is 5519408987.

7898049155 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7898049155 - 2² = 7898049151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7898049155.

It is not an unprimeable number, because it can be changed into a prime (7898049151) 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, 789804911 + ... + 789804920.

It is an arithmetic number, because the mean of its divisors is an integer number (2369414748).

Almost surely, 2^7898049155 is an apocalyptic number.

7898049155 is a deficient number, since it is larger than the sum of its proper divisors (1579609837).

7898049155 is a wasteful number, since it uses less digits than its factorization.

7898049155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579609836.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The square root of 7898049155 is about 88870.9691350331. The cubic root of 7898049155 is about 1991.4677483528.

The spelling of 7898049155 in words is "seven billion, eight hundred ninety-eight million, forty-nine thousand, one hundred fifty-five".