61715621668473 has 16 divisors (see below), whose sum is σ = 92795185706560. Its totient is φ = 40529661990048.

The previous prime is 61715621668471. The next prime is 61715621668501. The reversal of 61715621668473 is 37486612651716.

61715621668473 is a `hidden beast` number, since 6 + 1 + 7 + 1 + 562 + 1 + 6 + 68 + 4 + 7 + 3 = 666.

It is not a de Polignac number, because 61715621668473 - 2¹ = 61715621668471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61715621668473.

It is not an unprimeable number, because it can be changed into a prime (61715621668471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17057936740 + ... + 17057940357.

It is an arithmetic number, because the mean of its divisors is an integer number (5799699106660).

Almost surely, 2^{61715621668473} is an apocalyptic number.

It is an amenable number.

61715621668473 is a deficient number, since it is larger than the sum of its proper divisors (31079564038087).

61715621668473 is a wasteful number, since it uses less digits than its factorization.

61715621668473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34115877173 (or 34115877167 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 61715621668473 in words is "sixty-one trillion, seven hundred fifteen billion, six hundred twenty-one million, six hundred sixty-eight thousand, four hundred seventy-three".