6155939744640 has 768 divisors, whose sum is σ = 26180079206400. Its totient is φ = 1361676718080.

The previous prime is 6155939744569. The next prime is 6155939744651. The reversal of 6155939744640 is 464479395516.

It is a happy number.

6155939744640 is a `hidden beast` number, since 6 + 1 + 559 + 3 + 9 + 74 + 4 + 6 + 4 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26131057 + ... + 26365583.

It is an arithmetic number, because the mean of its divisors is an integer number (34088644800).

Almost surely, 2^{6155939744640} is an apocalyptic number.

6155939744640 is a gapful number since it is divisible by the number (60) 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 6155939744640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13090039603200).

6155939744640 is an abundant number, since it is smaller than the sum of its proper divisors (20024139461760).

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

6155939744640 is a wasteful number, since it uses less digits than its factorization.

6155939744640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234600 (or 234575 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 63.

The spelling of 6155939744640 in words is "six trillion, one hundred fifty-five billion, nine hundred thirty-nine million, seven hundred forty-four thousand, six hundred forty".