6542140080 has 80 divisors (see below), whose sum is σ = 23177873664. Its totient is φ = 1495345920.

The previous prime is 6542140067. The next prime is 6542140091. The reversal of 6542140080 is 800412456.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1945386 + ... + 1948745.

Almost surely, 2^6542140080 is an apocalyptic number.

6542140080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6542140080 is an abundant number, since it is smaller than the sum of its proper divisors (16635733584).

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

6542140080 is a wasteful number, since it uses less digits than its factorization.

6542140080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894154 (or 3894148 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 6542140080 is about 80883.4969570431. The cubic root of 6542140080 is about 1870.2799279724.

It can be divided in two parts, 65421 and 40080, that added together give a palindrome (105501).

The spelling of 6542140080 in words is "six billion, five hundred forty-two million, one hundred forty thousand, eighty".