172166411972379 has 64 divisors (see below), whose sum is σ = 252511249858560. Its totient is φ = 103476583392000.

The previous prime is 172166411972369. The next prime is 172166411972381. The reversal of 172166411972379 is 973279114661271.

It is not a de Polignac number, because 172166411972379 - 2¹¹ = 172166411970331 is a prime.

It is a super-2 number, since 2×172166411972379² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172166411972369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11930310294 + ... + 11930324724.

It is an arithmetic number, because the mean of its divisors is an integer number (3945488279040).

Almost surely, 2^{172166411972379} is an apocalyptic number.

172166411972379 is a deficient number, since it is larger than the sum of its proper divisors (80344837886181).

172166411972379 is a wasteful number, since it uses less digits than its factorization.

172166411972379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19512.

The product of its digits is 48009024, while the sum is 66.

The spelling of 172166411972379 in words is "one hundred seventy-two trillion, one hundred sixty-six billion, four hundred eleven million, nine hundred seventy-two thousand, three hundred seventy-nine".