6155632640 has 64 divisors (see below), whose sum is σ = 14773686120. Its totient is φ = 2462187520.

The previous prime is 6155632619. The next prime is 6155632649. The reversal of 6155632640 is 462365516.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 6155632594 and 6155632603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6155632649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145055 + ... + 182625.

Almost surely, 2^6155632640 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 6155632640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7386843060).

6155632640 is an abundant number, since it is smaller than the sum of its proper divisors (8618053480).

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

6155632640 is an frugal number, since it uses more digits than its factorization.

6155632640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37606 (or 37578 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 6155632640 is about 78457.8398886944. The cubic root of 6155632640 is about 1832.6979663500.

The spelling of 6155632640 in words is "six billion, one hundred fifty-five million, six hundred thirty-two thousand, six hundred forty".