6564155400000 has 504 divisors, whose sum is σ = 25655207524128. Its totient is φ = 1591305600000.

The previous prime is 6564155399999. The next prime is 6564155400013. The reversal of 6564155400000 is 45514656.

6564155400000 is a `hidden beast` number, since 6 + 5 + 641 + 5 + 5 + 4 + 0 + 0 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×6564155400000² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19634239 + ... + 19965761.

It is an arithmetic number, because the mean of its divisors is an integer number (50903189532).

Almost surely, 2^{6564155400000} is an apocalyptic number.

6564155400000 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 6564155400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12827603762064).

6564155400000 is an abundant number, since it is smaller than the sum of its proper divisors (19091052124128).

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

6564155400000 is a wasteful number, since it uses less digits than its factorization.

6564155400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331577 (or 331544 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 6564155400000 in words is "six trillion, five hundred sixty-four billion, one hundred fifty-five million, four hundred thousand".