61617171338 has 4 divisors (see below), whose sum is σ = 92425757010. Its totient is φ = 30808585668.

The previous prime is 61617171337. The next prime is 61617171349. The reversal of 61617171338 is 83317171616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 59552105089 + 2065066249 = 244033^2 + 45443^2 .

It is not an unprimeable number, because it can be changed into a prime (61617171337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15404292833 + ... + 15404292836.

Almost surely, 2^61617171338 is an apocalyptic number.

61617171338 is a deficient number, since it is larger than the sum of its proper divisors (30808585672).

61617171338 is a wasteful number, since it uses less digits than its factorization.

61617171338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30808585671.

The product of its digits is 127008, while the sum is 44.

The spelling of 61617171338 in words is "sixty-one billion, six hundred seventeen million, one hundred seventy-one thousand, three hundred thirty-eight".