5625387881 has 4 divisors (see below), whose sum is σ = 5625542100. Its totient is φ = 5625233664.

The previous prime is 5625387857. The next prime is 5625387949. The reversal of 5625387881 is 1887835265.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2469195481 + 3156192400 = 49691^2 + 56180^2 .

It is a cyclic number.

It is not a de Polignac number, because 5625387881 - 2¹⁴ = 5625371497 is a prime.

It is a super-2 number, since 2×5625387881² = 63289977623403340322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5625387181) 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, 11705 + ... + 106713.

It is an arithmetic number, because the mean of its divisors is an integer number (1406385525).

Almost surely, 2^5625387881 is an apocalyptic number.

It is an amenable number.

5625387881 is a deficient number, since it is larger than the sum of its proper divisors (154219).

5625387881 is an equidigital number, since it uses as much as digits as its factorization.

5625387881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154218.

The product of its digits is 3225600, while the sum is 53.

The square root of 5625387881 is about 75002.5858287566. The cubic root of 5625387881 is about 1778.4875298634.

The spelling of 5625387881 in words is "five billion, six hundred twenty-five million, three hundred eighty-seven thousand, eight hundred eighty-one".