2078144561 has 16 divisors (see below), whose sum is σ = 2135752704. Its totient is φ = 2021486544.

The previous prime is 2078144557. The next prime is 2078144567. The reversal of 2078144561 is 1654418702.

It is a cyclic number.

It is not a de Polignac number, because 2078144561 - 2² = 2078144557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078144567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2407616 + ... + 2408478.

It is an arithmetic number, because the mean of its divisors is an integer number (133484544).

Almost surely, 2^2078144561 is an apocalyptic number.

It is an amenable number.

2078144561 is a deficient number, since it is larger than the sum of its proper divisors (57608143).

2078144561 is a wasteful number, since it uses less digits than its factorization.

2078144561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 2078144561 is about 45586.6708698935. The cubic root of 2078144561 is about 1276.1211844382.

The spelling of 2078144561 in words is "two billion, seventy-eight million, one hundred forty-four thousand, five hundred sixty-one".