6453820040 has 64 divisors (see below), whose sum is σ = 14937350400. Its totient is φ = 2508323328.

The previous prime is 6453819919. The next prime is 6453820049. The reversal of 6453820040 is 400283546.

It is a junction number, because it is equal to n+sod(n) for n = 6453819979 and 6453820006.

It is not an unprimeable number, because it can be changed into a prime (6453820049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248972 + ... + 273668.

It is an arithmetic number, because the mean of its divisors is an integer number (233396100).

Almost surely, 2^6453820040 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 6453820040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7468675200).

6453820040 is an abundant number, since it is smaller than the sum of its proper divisors (8483530360).

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

6453820040 is a wasteful number, since it uses less digits than its factorization.

6453820040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24894 (or 24890 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 6453820040 is about 80335.6710309934. The cubic root of 6453820040 is about 1861.8253980155.

The spelling of 6453820040 in words is "six billion, four hundred fifty-three million, eight hundred twenty thousand, forty".