172148772061 has 8 divisors (see below), whose sum is σ = 199436542784. Its totient is φ = 145534773600.

The previous prime is 172148772049. The next prime is 172148772077. The reversal of 172148772061 is 160277841271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172148772061 is a prime.

It is a super-2 number, since 2×172148772061² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172148772031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168442515 + ... + 168443536.

It is an arithmetic number, because the mean of its divisors is an integer number (24929567848).

Almost surely, 2^172148772061 is an apocalyptic number.

It is an amenable number.

172148772061 is a deficient number, since it is larger than the sum of its proper divisors (27287770723).

172148772061 is an equidigital number, since it uses as much as digits as its factorization.

172148772061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336886131.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 172148772061 in words is "one hundred seventy-two billion, one hundred forty-eight million, seven hundred seventy-two thousand, sixty-one".