172804281998 has 16 divisors (see below), whose sum is σ = 260190253296. Its totient is φ = 86074797120.

The previous prime is 172804281977. The next prime is 172804282081. The reversal of 172804281998 is 899182408271.

It is a super-2 number, since 2×172804281998² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429218 + ... + 727898.

It is an arithmetic number, because the mean of its divisors is an integer number (16261890831).

Almost surely, 2^172804281998 is an apocalyptic number.

172804281998 is a deficient number, since it is larger than the sum of its proper divisors (87385971298).

172804281998 is a wasteful number, since it uses less digits than its factorization.

172804281998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299779.

The product of its (nonzero) digits is 4644864, while the sum is 59.

The spelling of 172804281998 in words is "one hundred seventy-two billion, eight hundred four million, two hundred eighty-one thousand, nine hundred ninety-eight".