7623540643 has 4 divisors (see below), whose sum is σ = 7829582320. Its totient is φ = 7417498968.

The previous prime is 7623540623. The next prime is 7623540653. The reversal of 7623540643 is 3460453267.

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

It is a cyclic number.

It is not a de Polignac number, because 7623540643 - 2⁵ = 7623540611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7623540596 and 7623540605.

It is not an unprimeable number, because it can be changed into a prime (7623540623) 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, 103020783 + ... + 103020856.

It is an arithmetic number, because the mean of its divisors is an integer number (1957395580).

Almost surely, 2^7623540643 is an apocalyptic number.

7623540643 is a deficient number, since it is larger than the sum of its proper divisors (206041677).

7623540643 is a wasteful number, since it uses less digits than its factorization.

7623540643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206041676.

The product of its (nonzero) digits is 362880, while the sum is 40.

The square root of 7623540643 is about 87312.8893291248. The cubic root of 7623540643 is about 1968.1230151302.

The spelling of 7623540643 in words is "seven billion, six hundred twenty-three million, five hundred forty thousand, six hundred forty-three".