5811640378 has 4 divisors (see below), whose sum is σ = 8717460570. Its totient is φ = 2905820188.

The previous prime is 5811640363. The next prime is 5811640399. The reversal of 5811640378 is 8730461185.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8730461185 = 5 ⋅1746092237.

It can be written as a sum of positive squares in only one way, i.e., 5501633929 + 310006449 = 74173^2 + 17607^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452910093 + ... + 1452910096.

Almost surely, 2^5811640378 is an apocalyptic number.

5811640378 is a deficient number, since it is larger than the sum of its proper divisors (2905820192).

5811640378 is a wasteful number, since it uses less digits than its factorization.

5811640378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905820191.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 5811640378 is about 76234.1155782633. The cubic root of 5811640378 is about 1797.9029465022.

The spelling of 5811640378 in words is "five billion, eight hundred eleven million, six hundred forty thousand, three hundred seventy-eight".