172740708337 has 4 divisors (see below), whose sum is σ = 173900042100. Its totient is φ = 171581374576.

The previous prime is 172740708281. The next prime is 172740708347. The reversal of 172740708337 is 733807047271.

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 100209600481 + 72531107856 = 316559^2 + 269316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172740708337 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172740708347) 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, 579666658 + ... + 579666955.

It is an arithmetic number, because the mean of its divisors is an integer number (43475010525).

Almost surely, 2^172740708337 is an apocalyptic number.

It is an amenable number.

172740708337 is a deficient number, since it is larger than the sum of its proper divisors (1159333763).

172740708337 is a wasteful number, since it uses less digits than its factorization.

172740708337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159333762.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The spelling of 172740708337 in words is "one hundred seventy-two billion, seven hundred forty million, seven hundred eight thousand, three hundred thirty-seven".