2564156144 has 20 divisors (see below), whose sum is σ = 5419694040. Its totient is φ = 1165525440.

The previous prime is 2564156143. The next prime is 2564156197. The reversal of 2564156144 is 4416514652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2564156098 and 2564156107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564156143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7284359 + ... + 7284710.

It is an arithmetic number, because the mean of its divisors is an integer number (270984702).

Almost surely, 2^2564156144 is an apocalyptic number.

It is an amenable number.

2564156144 is an abundant number, since it is smaller than the sum of its proper divisors (2855537896).

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

2564156144 is a wasteful number, since it uses less digits than its factorization.

2564156144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14569088 (or 14569082 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 2564156144 is about 50637.4974105159. The cubic root of 2564156144 is about 1368.7206598132.

The spelling of 2564156144 in words is "two billion, five hundred sixty-four million, one hundred fifty-six thousand, one hundred forty-four".