61373352172073 has 4 divisors (see below), whose sum is σ = 61493928502980. Its totient is φ = 61252775841168.

The previous prime is 61373352172063. The next prime is 61373352172087. The reversal of 61373352172073 is 37027125337316.

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 26907904922089 + 34465447249984 = 5187283^2 + 5870728^2 .

It is a cyclic number.

It is not a de Polignac number, because 61373352172073 - 2⁶ = 61373352172009 is a prime.

It is a super-2 number, since 2×61373352172073² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61373352172063) 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, 60288164690 + ... + 60288165707.

It is an arithmetic number, because the mean of its divisors is an integer number (15373482125745).

Almost surely, 2^{61373352172073} is an apocalyptic number.

It is an amenable number.

61373352172073 is a deficient number, since it is larger than the sum of its proper divisors (120576330907).

61373352172073 is a wasteful number, since it uses less digits than its factorization.

61373352172073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120576330906.

The product of its (nonzero) digits is 3333960, while the sum is 50.

The spelling of 61373352172073 in words is "sixty-one trillion, three hundred seventy-three billion, three hundred fifty-two million, one hundred seventy-two thousand, seventy-three".