2544157840 has 40 divisors (see below), whose sum is σ = 6760192320. Its totient is φ = 872282496.

The previous prime is 2544157829. The next prime is 2544157843. The reversal of 2544157840 is 487514452.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2544157840² = 12945478229666931200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2544157793 and 2544157802.

It is not an unprimeable number, because it can be changed into a prime (2544157843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2271010 + ... + 2272129.

It is an arithmetic number, because the mean of its divisors is an integer number (169004808).

Almost surely, 2^2544157840 is an apocalyptic number.

2544157840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2544157840 is an abundant number, since it is smaller than the sum of its proper divisors (4216034480).

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

2544157840 is a wasteful number, since it uses less digits than its factorization.

2544157840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543159 (or 4543153 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The square root of 2544157840 is about 50439.6455181834. The cubic root of 2544157840 is about 1365.1530713408.

The spelling of 2544157840 in words is "two billion, five hundred forty-four million, one hundred fifty-seven thousand, eight hundred forty".