2651273856 has 576 divisors, whose sum is σ = 10118122560. Its totient is φ = 671846400.

The previous prime is 2651273819. The next prime is 2651273893. The reversal of 2651273856 is 6583721562.

2651273856 is a `hidden beast` number, since 265 + 1 + 2 + 7 + 385 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (2651273819) and next prime (2651273893).

It is a tau number, because it is divible by the number of its divisors (576).

Its product of digits (604800) is a multiple of the sum of its prime divisors (64).

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 71 ways as a sum of consecutive naturals, for example, 64665196 + ... + 64665236.

It is an arithmetic number, because the mean of its divisors is an integer number (17566185).

Almost surely, 2^2651273856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2651273856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5059061280).

2651273856 is an abundant number, since it is smaller than the sum of its proper divisors (7466848704).

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

2651273856 is an frugal number, since it uses more digits than its factorization.

2651273856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 64 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 2651273856 is about 51490.5220016267. The cubic root of 2651273856 is about 1384.0492035922.

The spelling of 2651273856 in words is "two billion, six hundred fifty-one million, two hundred seventy-three thousand, eight hundred fifty-six".