2172927939840 has 864 divisors, whose sum is σ = 8879724672000. Its totient is φ = 490311843840.

The previous prime is 2172927939823. The next prime is 2172927939881. The reversal of 2172927939840 is 489397292712.

2172927939840 is a `hidden beast` number, since 2 + 172 + 9 + 2 + 79 + 398 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 312153960 + ... + 312160920.

Almost surely, 2^{2172927939840} is an apocalyptic number.

2172927939840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172927939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4439862336000).

2172927939840 is an abundant number, since it is smaller than the sum of its proper divisors (6706796732160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172927939840 is an equidigital number, since it uses as much as digits as its factorization.

2172927939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7088 (or 7057 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 2172927939840 in words is "two trillion, one hundred seventy-two billion, nine hundred twenty-seven million, nine hundred thirty-nine thousand, eight hundred forty".