172680372899 has 4 divisors (see below), whose sum is σ = 173922677880. Its totient is φ = 171438067920.

The previous prime is 172680372883. The next prime is 172680372911. The reversal of 172680372899 is 998273086271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998273086271 = 37 ⋅26980353683.

It is a cyclic number.

It is not a de Polignac number, because 172680372899 - 2⁴ = 172680372883 is a prime.

It is a super-2 number, since 2×172680372899² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172680372859) 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, 621152282 + ... + 621152559.

It is an arithmetic number, because the mean of its divisors is an integer number (43480669470).

Almost surely, 2^172680372899 is an apocalyptic number.

172680372899 is a deficient number, since it is larger than the sum of its proper divisors (1242304981).

172680372899 is a wasteful number, since it uses less digits than its factorization.

172680372899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242304980.

The product of its (nonzero) digits is 18289152, while the sum is 62.

The spelling of 172680372899 in words is "one hundred seventy-two billion, six hundred eighty million, three hundred seventy-two thousand, eight hundred ninety-nine".