172020550651 has 8 divisors (see below), whose sum is σ = 180919972224. Its totient is φ = 163330527360.

The previous prime is 172020550633. The next prime is 172020550661. The reversal of 172020550651 is 156055020271.

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

It is a cyclic number.

It is not a de Polignac number, because 172020550651 - 2¹⁵ = 172020517883 is a prime.

It is a super-3 number, since 3×172020550651³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172020550631) 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, 52347886 + ... + 52351171.

It is an arithmetic number, because the mean of its divisors is an integer number (22614996528).

Almost surely, 2^172020550651 is an apocalyptic number.

172020550651 is a deficient number, since it is larger than the sum of its proper divisors (8899421573).

172020550651 is a wasteful number, since it uses less digits than its factorization.

172020550651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104699141.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 172020550651 in words is "one hundred seventy-two billion, twenty million, five hundred fifty thousand, six hundred fifty-one".