449739640980 has 864 divisors, whose sum is σ = 1733746291200. Its totient is φ = 96487469568.

The previous prime is 449739640969. The next prime is 449739640981. The reversal of 449739640980 is 89046937944.

449739640980 is a `hidden beast` number, since 4 + 497 + 3 + 9 + 64 + 0 + 9 + 80 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449739640981) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1881755701 + ... + 1881755939.

It is an arithmetic number, because the mean of its divisors is an integer number (2006650800).

Almost surely, 2^449739640980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449739640980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866873145600).

449739640980 is an abundant number, since it is smaller than the sum of its proper divisors (1284006650220).

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

449739640980 is a wasteful number, since it uses less digits than its factorization.

449739640980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 449739640980 in words is "four hundred forty-nine billion, seven hundred thirty-nine million, six hundred forty thousand, nine hundred eighty".