6915409020 has 480 divisors, whose sum is σ = 24674126400. Its totient is φ = 1619025408.

The previous prime is 6915409019. The next prime is 6915409091. The reversal of 6915409020 is 209045196.

6915409020 is a `hidden beast` number, since 6 + 9 + 1 + 540 + 90 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 103215027 + ... + 103215093.

It is an arithmetic number, because the mean of its divisors is an integer number (51404430).

Almost surely, 2^6915409020 is an apocalyptic number.

6915409020 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 6915409020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12337063200).

6915409020 is an abundant number, since it is smaller than the sum of its proper divisors (17758717380).

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

6915409020 is a wasteful number, since it uses less digits than its factorization.

6915409020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 6915409020 is about 83158.9383049110. The cubic root of 6915409020 is about 1905.1943753552.

The spelling of 6915409020 in words is "six billion, nine hundred fifteen million, four hundred nine thousand, twenty".