4180784640 has 80 divisors (see below), whose sum is σ = 13365470448. Its totient is φ = 1114873856.

The previous prime is 4180784579. The next prime is 4180784659. The reversal of 4180784640 is 464870814.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 4180784592 and 4180784601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264507 + ... + 279866.

Almost surely, 2^4180784640 is an apocalyptic number.

4180784640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4180784640 is an abundant number, since it is smaller than the sum of its proper divisors (9184685808).

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

4180784640 is an equidigital number, since it uses as much as digits as its factorization.

4180784640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544399 (or 544383 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 4180784640 is about 64658.9873103500. The cubic root of 4180784640 is about 1610.9643593042.

The spelling of 4180784640 in words is "four billion, one hundred eighty million, seven hundred eighty-four thousand, six hundred forty".