7540621205 has 16 divisors (see below), whose sum is σ = 9794285424. Its totient is φ = 5540183040.

The previous prime is 7540621189. The next prime is 7540621217. The reversal of 7540621205 is 5021260457.

7540621205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 314601169 + 7226020036 = 17737^2 + 85006^2 .

It is not a de Polignac number, because 7540621205 - 2⁴ = 7540621189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281636 + ... + 307245.

It is an arithmetic number, because the mean of its divisors is an integer number (612142839).

Almost surely, 2^7540621205 is an apocalyptic number.

It is an amenable number.

7540621205 is a deficient number, since it is larger than the sum of its proper divisors (2253664219).

7540621205 is a wasteful number, since it uses less digits than its factorization.

7540621205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589096.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 7540621205 is about 86836.7503134474. The cubic root of 7540621205 is about 1960.9613849660.

The spelling of 7540621205 in words is "seven billion, five hundred forty million, six hundred twenty-one thousand, two hundred five".