61723625321661 has 8 divisors (see below), whose sum is σ = 82546802042784. Its totient is φ = 41024766074160.

The previous prime is 61723625321507. The next prime is 61723625321711. The reversal of 61723625321661 is 16612352632716.

61723625321661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-61723625321661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61723625321261) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31079367246 + ... + 31079369231.

It is an arithmetic number, because the mean of its divisors is an integer number (10318350255348).

Almost surely, 2^{61723625321661} is an apocalyptic number.

It is an amenable number.

61723625321661 is a deficient number, since it is larger than the sum of its proper divisors (20823176721123).

61723625321661 is a wasteful number, since it uses less digits than its factorization.

61723625321661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62158736811.

The product of its digits is 3265920, while the sum is 51.

The spelling of 61723625321661 in words is "sixty-one trillion, seven hundred twenty-three billion, six hundred twenty-five million, three hundred twenty-one thousand, six hundred sixty-one".