9651662641 has 4 divisors (see below), whose sum is σ = 9652435492. Its totient is φ = 9650889792.

The previous prime is 9651662627. The next prime is 9651662651. The reversal of 9651662641 is 1462661569.

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 6053462416 + 3598200225 = 77804^2 + 59985^2 .

It is a cyclic number.

It is not a de Polignac number, because 9651662641 - 2⁵ = 9651662609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9651662591 and 9651662600.

It is not an unprimeable number, because it can be changed into a prime (9651662621) 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, 367380 + ... + 392773.

It is an arithmetic number, because the mean of its divisors is an integer number (2413108873).

Almost surely, 2^9651662641 is an apocalyptic number.

It is an amenable number.

9651662641 is a deficient number, since it is larger than the sum of its proper divisors (772851).

9651662641 is a wasteful number, since it uses less digits than its factorization.

9651662641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772850.

The product of its digits is 466560, while the sum is 46.

The square root of 9651662641 is about 98242.8757773305. The cubic root of 9651662641 is about 2129.1228022603.

The spelling of 9651662641 in words is "nine billion, six hundred fifty-one million, six hundred sixty-two thousand, six hundred forty-one".