61277599577197 has 4 divisors (see below), whose sum is σ = 61277616973980. Its totient is φ = 61277582180416.

The previous prime is 61277599577149. The next prime is 61277599577209. The reversal of 61277599577197 is 79177599577216.

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 43213518542601 + 18064081034596 = 6573699^2 + 4250186^2 .

It is a cyclic number.

It is not a de Polignac number, because 61277599577197 - 2¹⁵ = 61277599544429 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 61277599577197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61277599577797) 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, 1339822 + ... + 11151247.

It is an arithmetic number, because the mean of its divisors is an integer number (15319404243495).

Almost surely, 2^{61277599577197} is an apocalyptic number.

It is an amenable number.

61277599577197 is a deficient number, since it is larger than the sum of its proper divisors (17396783).

61277599577197 is a wasteful number, since it uses less digits than its factorization.

61277599577197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17396782.

The product of its digits is 3675690900, while the sum is 82.

The spelling of 61277599577197 in words is "sixty-one trillion, two hundred seventy-seven billion, five hundred ninety-nine million, five hundred seventy-seven thousand, one hundred ninety-seven".