7131805538 has 16 divisors (see below), whose sum is σ = 12567937536. Its totient is φ = 2992365840.

The previous prime is 7131805519. The next prime is 7131805547. The reversal of 7131805538 is 8355081317.

It is a junction number, because it is equal to n+sod(n) for n = 7131805495 and 7131805504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12467906 + ... + 12468477.

It is an arithmetic number, because the mean of its divisors is an integer number (785496096).

Almost surely, 2^7131805538 is an apocalyptic number.

7131805538 is a deficient number, since it is larger than the sum of its proper divisors (5436131998).

7131805538 is a wasteful number, since it uses less digits than its factorization.

7131805538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24936409.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 7131805538 is about 84450.0179869726. The cubic root of 7131805538 is about 1924.8630284731.

The spelling of 7131805538 in words is "seven billion, one hundred thirty-one million, eight hundred five thousand, five hundred thirty-eight".