61716902045 has 4 divisors (see below), whose sum is σ = 74060282460. Its totient is φ = 49373521632.

The previous prime is 61716902021. The next prime is 61716902047. The reversal of 61716902045 is 54020961716.

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 42715382329 + 19001519716 = 206677^2 + 137846^2 .

It is a cyclic number.

It is not a de Polignac number, because 61716902045 - 2⁸ = 61716901789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61716901993 and 61716902011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61716902047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6171690200 + ... + 6171690209.

It is an arithmetic number, because the mean of its divisors is an integer number (18515070615).

Almost surely, 2^61716902045 is an apocalyptic number.

It is an amenable number.

61716902045 is a deficient number, since it is larger than the sum of its proper divisors (12343380415).

61716902045 is a wasteful number, since it uses less digits than its factorization.

61716902045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343380414.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 61716902045 in words is "sixty-one billion, seven hundred sixteen million, nine hundred two thousand, forty-five".