7646447861 has 16 divisors (see below), whose sum is σ = 8521822848. Its totient is φ = 6815016000.

The previous prime is 7646447857. The next prime is 7646447863. The reversal of 7646447861 is 1687446467.

It is a happy number.

It is not a de Polignac number, because 7646447861 - 2² = 7646447857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7646447863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2336 + ... + 123686.

It is an arithmetic number, because the mean of its divisors is an integer number (532613928).

Almost surely, 2^7646447861 is an apocalyptic number.

It is an amenable number.

7646447861 is a deficient number, since it is larger than the sum of its proper divisors (875374987).

7646447861 is a wasteful number, since it uses less digits than its factorization.

7646447861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121532.

The product of its digits is 5419008, while the sum is 53.

The square root of 7646447861 is about 87443.9698378339. The cubic root of 7646447861 is about 1970.0923162696.

The spelling of 7646447861 in words is "seven billion, six hundred forty-six million, four hundred forty-seven thousand, eight hundred sixty-one".