6534661015 has 4 divisors (see below), whose sum is σ = 7841593224. Its totient is φ = 5227728808.

The previous prime is 6534660989. The next prime is 6534661019. The reversal of 6534661015 is 5101664356.

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

It is a cyclic number.

It is not a de Polignac number, because 6534661015 - 2²³ = 6526272407 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 (6534661019) 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, 653466097 + ... + 653466106.

It is an arithmetic number, because the mean of its divisors is an integer number (1960398306).

Almost surely, 2^6534661015 is an apocalyptic number.

6534661015 is a deficient number, since it is larger than the sum of its proper divisors (1306932209).

6534661015 is a wasteful number, since it uses less digits than its factorization.

6534661015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306932208.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6534661015 is about 80837.2501697083. The cubic root of 6534661015 is about 1869.5669462483.

It can be divided in two parts, 653466 and 1015, that added together give a square (654481 = 809²).

The spelling of 6534661015 in words is "six billion, five hundred thirty-four million, six hundred sixty-one thousand, fifteen".