61595922109945 has 4 divisors (see below), whose sum is σ = 73915106531940. Its totient is φ = 49276737687952.

The previous prime is 61595922109933. The next prime is 61595922109951. The reversal of 61595922109945 is 54990122959516.

61595922109945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29310389004649 + 32285533105296 = 5413907^2 + 5682036^2 .

It is a cyclic number.

It is not a de Polignac number, because 61595922109945 - 2¹⁹ = 61595921585657 is a prime.

It is a super-2 number, since 2×61595922109945² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6159592210990 + ... + 6159592210999.

It is an arithmetic number, because the mean of its divisors is an integer number (18478776632985).

Almost surely, 2^{61595922109945} is an apocalyptic number.

It is an amenable number.

61595922109945 is a deficient number, since it is larger than the sum of its proper divisors (12319184421995).

61595922109945 is a wasteful number, since it uses less digits than its factorization.

61595922109945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12319184421994.

The product of its (nonzero) digits is 78732000, while the sum is 67.

The spelling of 61595922109945 in words is "sixty-one trillion, five hundred ninety-five billion, nine hundred twenty-two million, one hundred nine thousand, nine hundred forty-five".