6534661560 has 384 divisors, whose sum is σ = 24013324800. Its totient is φ = 1415715840.

The previous prime is 6534661559. The next prime is 6534661571. The reversal of 6534661560 is 651664356.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28535526 + ... + 28535754.

It is an arithmetic number, because the mean of its divisors is an integer number (62534700).

Almost surely, 2^6534661560 is an apocalyptic number.

6534661560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6534661560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12006662400).

6534661560 is an abundant number, since it is smaller than the sum of its proper divisors (17478663240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6534661560 is a wasteful number, since it uses less digits than its factorization.

6534661560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 6534661560 is about 80837.2535406789. The cubic root of 6534661560 is about 1869.5669982231.

The spelling of 6534661560 in words is "six billion, five hundred thirty-four million, six hundred sixty-one thousand, five hundred sixty".