7620430745 has 4 divisors (see below), whose sum is σ = 9144516900. Its totient is φ = 6096344592.

The previous prime is 7620430739. The next prime is 7620430747. The reversal of 7620430745 is 5470340267.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4848197641 + 2772233104 = 69629^2 + 52652^2 .

It is a cyclic number.

It is not a de Polignac number, because 7620430745 - 2⁴ = 7620430729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7620430699 and 7620430708.

It is not an unprimeable number, because it can be changed into a prime (7620430747) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 762043070 + ... + 762043079.

It is an arithmetic number, because the mean of its divisors is an integer number (2286129225).

Almost surely, 2^7620430745 is an apocalyptic number.

It is an amenable number.

7620430745 is a deficient number, since it is larger than the sum of its proper divisors (1524086155).

7620430745 is a wasteful number, since it uses less digits than its factorization.

7620430745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524086154.

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 7620430745 is about 87295.0785840760. The cubic root of 7620430745 is about 1967.8553575951.

The spelling of 7620430745 in words is "seven billion, six hundred twenty million, four hundred thirty thousand, seven hundred forty-five".