5495678639 has 4 divisors (see below), whose sum is σ = 5995285800. Its totient is φ = 4996071480.

The previous prime is 5495678633. The next prime is 5495678641. The reversal of 5495678639 is 9368765945.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5495678639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5495678633) 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, 249803564 + ... + 249803585.

It is an arithmetic number, because the mean of its divisors is an integer number (1498821450).

Almost surely, 2^5495678639 is an apocalyptic number.

5495678639 is a deficient number, since it is larger than the sum of its proper divisors (499607161).

5495678639 is a wasteful number, since it uses less digits than its factorization.

5495678639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499607160.

The product of its digits is 48988800, while the sum is 62.

The square root of 5495678639 is about 74132.8445360085. The cubic root of 5495678639 is about 1764.7117462421.

The spelling of 5495678639 in words is "five billion, four hundred ninety-five million, six hundred seventy-eight thousand, six hundred thirty-nine".