61071706655501 has 4 divisors (see below), whose sum is σ = 61071796403772. Its totient is φ = 61071616907232.

The previous prime is 61071706655471. The next prime is 61071706655503. The reversal of 61071706655501 is 10555660717016.

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 30009743953225 + 31061962702276 = 5478115^2 + 5573326^2 .

It is a cyclic number.

It is not a de Polignac number, because 61071706655501 - 2¹⁴ = 61071706639117 is a prime.

It is a super-2 number, since 2×61071706655501² (a number of 28 digits) contains 22 as substring.

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 61071706655501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61071706655503) 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, 43845560 + ... + 45216993.

It is an arithmetic number, because the mean of its divisors is an integer number (15267949100943).

Almost surely, 2^{61071706655501} is an apocalyptic number.

It is an amenable number.

61071706655501 is a deficient number, since it is larger than the sum of its proper divisors (89748271).

61071706655501 is an equidigital number, since it uses as much as digits as its factorization.

61071706655501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89748270.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The spelling of 61071706655501 in words is "sixty-one trillion, seventy-one billion, seven hundred six million, six hundred fifty-five thousand, five hundred one".