5642551811 has 4 divisors (see below), whose sum is σ = 6076594272. Its totient is φ = 5208509352.

The previous prime is 5642551799. The next prime is 5642551823. The reversal of 5642551811 is 1181552465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1181552465 = 5 ⋅236310493.

It is an interprime number because it is at equal distance from previous prime (5642551799) and next prime (5642551823).

It is a cyclic number.

It is not a de Polignac number, because 5642551811 - 2¹⁰ = 5642550787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5642551861) 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, 217021211 + ... + 217021236.

It is an arithmetic number, because the mean of its divisors is an integer number (1519148568).

Almost surely, 2^5642551811 is an apocalyptic number.

5642551811 is a deficient number, since it is larger than the sum of its proper divisors (434042461).

5642551811 is a wasteful number, since it uses less digits than its factorization.

5642551811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434042460.

The product of its digits is 48000, while the sum is 38.

The square root of 5642551811 is about 75116.9209366305. The cubic root of 5642551811 is about 1780.2945069870.

The spelling of 5642551811 in words is "five billion, six hundred forty-two million, five hundred fifty-one thousand, eight hundred eleven".