561601066649 has 8 divisors (see below), whose sum is σ = 641835792000. Its totient is φ = 481367841696.

The previous prime is 561601066639. The next prime is 561601066703. The reversal of 561601066649 is 946660106165.

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

It is not a de Polignac number, because 561601066649 - 2³² = 557306099353 is a prime.

It is a super-2 number, since 2×561601066649² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561601066597 and 561601066606.

It is not an unprimeable number, because it can be changed into a prime (561601066639) 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, 593852 + ... + 1214850.

It is an arithmetic number, because the mean of its divisors is an integer number (80229474000).

Almost surely, 2^561601066649 is an apocalyptic number.

It is an amenable number.

561601066649 is a deficient number, since it is larger than the sum of its proper divisors (80234725351).

561601066649 is a wasteful number, since it uses less digits than its factorization.

561601066649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750199.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 561601066649 in words is "five hundred sixty-one billion, six hundred one million, sixty-six thousand, six hundred forty-nine".