61054571745 has 20 divisors (see below), whose sum is σ = 109445973780. Its totient is φ = 32562438048.

The previous prime is 61054571713. The next prime is 61054571779. The reversal of 61054571745 is 54717545016.

61054571745 is a `hidden beast` number, since 6 + 1 + 0 + 5 + 4 + 571 + 74 + 5 = 666.

61054571745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42994437201 + 18060134544 = 207351^2 + 134388^2 .

It is not a de Polignac number, because 61054571745 - 2⁵ = 61054571713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61054571745.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75375610 + ... + 75376419.

It is an arithmetic number, because the mean of its divisors is an integer number (5472298689).

Almost surely, 2^61054571745 is an apocalyptic number.

It is an amenable number.

61054571745 is a deficient number, since it is larger than the sum of its proper divisors (48391402035).

61054571745 is a wasteful number, since it uses less digits than its factorization.

61054571745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150752046 (or 150752037 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 61054571745 in words is "sixty-one billion, fifty-four million, five hundred seventy-one thousand, seven hundred forty-five".