6539156798 has 4 divisors (see below), whose sum is σ = 9808735200. Its totient is φ = 3269578398.

The previous prime is 6539156797. The next prime is 6539156803. The reversal of 6539156798 is 8976519356.

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

It is a super-2 number, since 2×6539156798² = 85521143257659225608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539156797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1634789198 + ... + 1634789201.

It is an arithmetic number, because the mean of its divisors is an integer number (2452183800).

Almost surely, 2^6539156798 is an apocalyptic number.

6539156798 is a deficient number, since it is larger than the sum of its proper divisors (3269578402).

6539156798 is a wasteful number, since it uses less digits than its factorization.

6539156798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269578401.

The product of its digits is 12247200, while the sum is 59.

The square root of 6539156798 is about 80865.0530080825. The cubic root of 6539156798 is about 1869.9955958984.

The spelling of 6539156798 in words is "six billion, five hundred thirty-nine million, one hundred fifty-six thousand, seven hundred ninety-eight".