6540276078 has 72 divisors (see below), whose sum is σ = 16644436848. Its totient is φ = 1850482368.

The previous prime is 6540275999. The next prime is 6540276133. The reversal of 6540276078 is 8706720456.

It is a super-2 number, since 2×6540276078² = 85550422352918124168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 35 ways as a sum of consecutive naturals, for example, 54850 + ... + 126842.

It is an arithmetic number, because the mean of its divisors is an integer number (231172734).

Almost surely, 2^6540276078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6540276078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8322218424).

6540276078 is an abundant number, since it is smaller than the sum of its proper divisors (10104160770).

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

6540276078 is a wasteful number, since it uses less digits than its factorization.

6540276078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72118 (or 72108 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 6540276078 is about 80871.9733776789. The cubic root of 6540276078 is about 1870.1022829085.

The spelling of 6540276078 in words is "six billion, five hundred forty million, two hundred seventy-six thousand, seventy-eight".