65561402564622 has 48 divisors (see below), whose sum is σ = 147959752292352. Its totient is φ = 21757528567800.

The previous prime is 65561402564621. The next prime is 65561402564641. The reversal of 65561402564622 is 22646520416556.

65561402564622 is a `hidden beast` number, since 6 + 5 + 5 + 6 + 1 + 4 + 0 + 2 + 5 + 6 + 4 + 622 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65561402564621) 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 23 ways as a sum of consecutive naturals, for example, 297026254 + ... + 297246897.

It is an arithmetic number, because the mean of its divisors is an integer number (3082494839424).

Almost surely, 2^{65561402564622} is an apocalyptic number.

65561402564622 is an abundant number, since it is smaller than the sum of its proper divisors (82398349727730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65561402564622 is a wasteful number, since it uses less digits than its factorization.

65561402564622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594273395 (or 594273383 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 65561402564622 in words is "sixty-five trillion, five hundred sixty-one billion, four hundred two million, five hundred sixty-four thousand, six hundred twenty-two".