6532639680 has 112 divisors (see below), whose sum is σ = 23704174080. Its totient is φ = 1493173248.

The previous prime is 6532639669. The next prime is 6532639681. The reversal of 6532639680 is 869362356.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6532639681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479340 + ... + 492779.

Almost surely, 2^6532639680 is an apocalyptic number.

6532639680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6532639680 is an abundant number, since it is smaller than the sum of its proper divisors (17171534400).

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

6532639680 is a wasteful number, since it uses less digits than its factorization.

6532639680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972146 (or 972136 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The square root of 6532639680 is about 80824.7467054491. The cubic root of 6532639680 is about 1869.3741583434.

The spelling of 6532639680 in words is "six billion, five hundred thirty-two million, six hundred thirty-nine thousand, six hundred eighty".