2179449640368 has 1920 divisors, whose sum is σ = 8895174672384. Its totient is φ = 479853158400.

The previous prime is 2179449640363. The next prime is 2179449640397. The reversal of 2179449640368 is 8630469449712.

It is a happy number.

2179449640368 is a `hidden beast` number, since 2 + 1 + 79 + 4 + 496 + 40 + 36 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2179449640363) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 11063196046 + ... + 11063196242.

Almost surely, 2^{2179449640368} is an apocalyptic number.

2179449640368 is a gapful number since it is divisible by the number (28) 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 2179449640368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4447587336192).

2179449640368 is an abundant number, since it is smaller than the sum of its proper divisors (6715725032016).

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

2179449640368 is a wasteful number, since it uses less digits than its factorization.

2179449640368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 2179449640368 in words is "two trillion, one hundred seventy-nine billion, four hundred forty-nine million, six hundred forty thousand, three hundred sixty-eight".