8450061605661 has 8 divisors (see below), whose sum is σ = 12133421792800. Its totient is φ = 5200037911152.

The previous prime is 8450061605611. The next prime is 8450061605663. The reversal of 8450061605661 is 1665061600548.

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

It is not a de Polignac number, because 8450061605661 - 2²⁵ = 8450028051229 is a prime.

It is a super-2 number, since 2×8450061605661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8450061605661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8450061605663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108334123111 + ... + 108334123188.

It is an arithmetic number, because the mean of its divisors is an integer number (1516677724100).

Almost surely, 2^{8450061605661} is an apocalyptic number.

It is an amenable number.

8450061605661 is a deficient number, since it is larger than the sum of its proper divisors (3683360187139).

8450061605661 is a wasteful number, since it uses less digits than its factorization.

8450061605661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216668246315.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 8450061605661 in words is "eight trillion, four hundred fifty billion, sixty-one million, six hundred five thousand, six hundred sixty-one".