6506734440 has 64 divisors (see below), whose sum is σ = 19996320960. Its totient is φ = 1692807680.

The previous prime is 6506734439. The next prime is 6506734441. The reversal of 6506734440 is 444376056.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6506734439) and next prime (6506734441).

It is a super-2 number, since 2×6506734440² = 84675186145364227200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6506734441) 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, 656334 + ... + 666173.

It is an arithmetic number, because the mean of its divisors is an integer number (312442515).

Almost surely, 2^6506734440 is an apocalyptic number.

6506734440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6506734440 is an abundant number, since it is smaller than the sum of its proper divisors (13489586520).

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

6506734440 is a wasteful number, since it uses less digits than its factorization.

6506734440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322562 (or 1322558 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 6506734440 is about 80664.3318945865. The cubic root of 6506734440 is about 1866.8998783172.

The spelling of 6506734440 in words is "six billion, five hundred six million, seven hundred thirty-four thousand, four hundred forty".