9545021681 has 8 divisors (see below), whose sum is σ = 10292326464. Its totient is φ = 8799584400.

The previous prime is 9545021669. The next prime is 9545021699. The reversal of 9545021681 is 1861205459.

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 9545021681 - 2⁶ = 9545021617 is a prime.

It is a super-2 number, since 2×9545021681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9545021081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456245 + ... + 476706.

It is an arithmetic number, because the mean of its divisors is an integer number (1286540808).

Almost surely, 2^9545021681 is an apocalyptic number.

It is an amenable number.

9545021681 is a deficient number, since it is larger than the sum of its proper divisors (747304783).

9545021681 is a wasteful number, since it uses less digits than its factorization.

9545021681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933751.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 9545021681 is about 97698.6268122536. The cubic root of 9545021681 is about 2121.2522032214.

The spelling of 9545021681 in words is "nine billion, five hundred forty-five million, twenty-one thousand, six hundred eighty-one".