7473712561 has 4 divisors (see below), whose sum is σ = 8541385792. Its totient is φ = 6406039332.

The previous prime is 7473712553. The next prime is 7473712579. The reversal of 7473712561 is 1652173747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7473712561 - 2³ = 7473712553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7471712561) 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, 533836605 + ... + 533836618.

It is an arithmetic number, because the mean of its divisors is an integer number (2135346448).

Almost surely, 2^7473712561 is an apocalyptic number.

It is an amenable number.

7473712561 is a deficient number, since it is larger than the sum of its proper divisors (1067673231).

7473712561 is a wasteful number, since it uses less digits than its factorization.

7473712561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067673230.

The product of its digits is 246960, while the sum is 43.

The square root of 7473712561 is about 86450.6365563609. The cubic root of 7473712561 is about 1955.1442136057.

The spelling of 7473712561 in words is "seven billion, four hundred seventy-three million, seven hundred twelve thousand, five hundred sixty-one".