172748102551 has 4 divisors (see below), whose sum is σ = 172748957704. Its totient is φ = 172747247400.

The previous prime is 172748102491. The next prime is 172748102599. The reversal of 172748102551 is 155201847271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 155201847271 = 397 ⋅390936643.

It is a cyclic number.

It is not a de Polignac number, because 172748102551 - 2²⁹ = 172211231639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172748102498 and 172748102507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172748102651) 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, 63241 + ... + 591181.

It is an arithmetic number, because the mean of its divisors is an integer number (43187239426).

Almost surely, 2^172748102551 is an apocalyptic number.

172748102551 is a deficient number, since it is larger than the sum of its proper divisors (855153).

172748102551 is an equidigital number, since it uses as much as digits as its factorization.

172748102551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855152.

The product of its (nonzero) digits is 156800, while the sum is 43.

The spelling of 172748102551 in words is "one hundred seventy-two billion, seven hundred forty-eight million, one hundred two thousand, five hundred fifty-one".