9646453381 has 8 divisors (see below), whose sum is σ = 9879414104. Its totient is φ = 9416217600.

The previous prime is 9646453343. The next prime is 9646453393. The reversal of 9646453381 is 1833546469.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 864889281 + 8781564100 = 29409^2 + 93710^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9646453381 - 2²⁵ = 9612898949 is a prime.

It is a super-2 number, since 2×9646453381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9646453301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674070 + ... + 688231.

It is an arithmetic number, because the mean of its divisors is an integer number (1234926763).

Almost surely, 2^9646453381 is an apocalyptic number.

It is an amenable number.

9646453381 is a deficient number, since it is larger than the sum of its proper divisors (232960723).

9646453381 is a wasteful number, since it uses less digits than its factorization.

9646453381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362471.

The product of its digits is 1866240, while the sum is 49.

The square root of 9646453381 is about 98216.3600476010. The cubic root of 9646453381 is about 2128.7396851865.

The spelling of 9646453381 in words is "nine billion, six hundred forty-six million, four hundred fifty-three thousand, three hundred eighty-one".