101725066645 has 4 divisors (see below), whose sum is σ = 122070079980. Its totient is φ = 81380053312.

The previous prime is 101725066637. The next prime is 101725066649. The reversal of 101725066645 is 546660527101.

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 23272417809 + 78452648836 = 152553^2 + 280094^2 .

It is a cyclic number.

It is not a de Polignac number, because 101725066645 - 2³ = 101725066637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101725066649) 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, 10172506660 + ... + 10172506669.

It is an arithmetic number, because the mean of its divisors is an integer number (30517519995).

Almost surely, 2^101725066645 is an apocalyptic number.

It is an amenable number.

101725066645 is a deficient number, since it is larger than the sum of its proper divisors (20345013335).

101725066645 is an equidigital number, since it uses as much as digits as its factorization.

101725066645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20345013334.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 101725066645 in words is "one hundred one billion, seven hundred twenty-five million, sixty-six thousand, six hundred forty-five".