2440651154561 has 4 divisors (see below), whose sum is σ = 2440924503300. Its totient is φ = 2440377805824.

The previous prime is 2440651154533. The next prime is 2440651154587. The reversal of 2440651154561 is 1654511560442.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 858854441536 + 1581796713025 = 926744^2 + 1257695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2440651154561 is a prime.

It is a super-2 number, since 2×2440651154561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2440651154521) 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 3 ways as a sum of consecutive naturals, for example, 136660976 + ... + 136678833.

It is an arithmetic number, because the mean of its divisors is an integer number (610231125825).

Almost surely, 2^{2440651154561} is an apocalyptic number.

It is an amenable number.

2440651154561 is a deficient number, since it is larger than the sum of its proper divisors (273348739).

2440651154561 is an equidigital number, since it uses as much as digits as its factorization.

2440651154561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273348738.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 2440651154561 in words is "two trillion, four hundred forty billion, six hundred fifty-one million, one hundred fifty-four thousand, five hundred sixty-one".