2697649920 has 756 divisors, whose sum is σ = 11460891960. Its totient is φ = 606154752.

The previous prime is 2697649901. The next prime is 2697649931. The reversal of 2697649920 is 299467962.

2697649920 is a `hidden beast` number, since 2 + 69 + 76 + 499 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (756).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 45722851 + ... + 45722909.

It is an arithmetic number, because the mean of its divisors is an integer number (15159910).

Almost surely, 2^2697649920 is an apocalyptic number.

2697649920 is a gapful number since it is divisible by the number (20) 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 2697649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5730445980).

2697649920 is an abundant number, since it is smaller than the sum of its proper divisors (8763242040).

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

2697649920 is an frugal number, since it uses more digits than its factorization.

2697649920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 2697649920 is about 51938.9056488486. The cubic root of 2697649920 is about 1392.0725289200.

The spelling of 2697649920 in words is "two billion, six hundred ninety-seven million, six hundred forty-nine thousand, nine hundred twenty".