61366552544745 has 64 divisors (see below), whose sum is σ = 124687454976000. Its totient is φ = 28051884957888.

The previous prime is 61366552544743. The next prime is 61366552544767. The reversal of 61366552544745 is 54744525566316.

It is a happy number.

61366552544745 is a `hidden beast` number, since 6 + 1 + 3 + 6 + 6 + 552 + 5 + 4 + 4 + 74 + 5 = 666.

It is not a de Polignac number, because 61366552544745 - 2¹ = 61366552544743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (61366552544743) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17501086 + ... + 20712824.

It is an arithmetic number, because the mean of its divisors is an integer number (1948241484000).

Almost surely, 2^{61366552544745} is an apocalyptic number.

It is an amenable number.

61366552544745 is an abundant number, since it is smaller than the sum of its proper divisors (63320902431255).

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

61366552544745 is a wasteful number, since it uses less digits than its factorization.

61366552544745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231979 (or 3231973 counting only the distinct ones).

The product of its digits is 362880000, while the sum is 63.

The spelling of 61366552544745 in words is "sixty-one trillion, three hundred sixty-six billion, five hundred fifty-two million, five hundred forty-four thousand, seven hundred forty-five".