2788145861 has 4 divisors (see below), whose sum is σ = 2934890400. Its totient is φ = 2641401324.

The previous prime is 2788145827. The next prime is 2788145873. The reversal of 2788145861 is 1685418872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2788145861 - 2³⁰ = 1714404037 is a prime.

It is a super-2 number, since 2×2788145861² = 15547514684422862642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788145161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73372241 + ... + 73372278.

It is an arithmetic number, because the mean of its divisors is an integer number (733722600).

Almost surely, 2^2788145861 is an apocalyptic number.

It is an amenable number.

2788145861 is a deficient number, since it is larger than the sum of its proper divisors (146744539).

2788145861 is a wasteful number, since it uses less digits than its factorization.

2788145861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146744538.

The product of its digits is 860160, while the sum is 50.

The square root of 2788145861 is about 52802.8963315461. The cubic root of 2788145861 is about 1407.4678933519.

The spelling of 2788145861 in words is "two billion, seven hundred eighty-eight million, one hundred forty-five thousand, eight hundred sixty-one".