6909749712 has 120 divisors (see below), whose sum is σ = 20701175040. Its totient is φ = 2228912640.

The previous prime is 6909749689. The next prime is 6909749771. The reversal of 6909749712 is 2179479096.

6909749712 is a `hidden beast` number, since 69 + 0 + 97 + 497 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91864 + ... + 149192.

It is an arithmetic number, because the mean of its divisors is an integer number (172509792).

Almost surely, 2^6909749712 is an apocalyptic number.

6909749712 is a gapful number since it is divisible by the number (62) 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 6909749712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10350587520).

6909749712 is an abundant number, since it is smaller than the sum of its proper divisors (13791425328).

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

6909749712 is a wasteful number, since it uses less digits than its factorization.

6909749712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57383 (or 57365 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 6909749712 is about 83124.9042826517. The cubic root of 6909749712 is about 1904.6745206224.

The spelling of 6909749712 in words is "six billion, nine hundred nine million, seven hundred forty-nine thousand, seven hundred twelve".