6561155620152 has 96 divisors (see below), whose sum is σ = 21377198793600. Its totient is φ = 1775951894592.

The previous prime is 6561155620147. The next prime is 6561155620153. The reversal of 6561155620152 is 2510265511656.

It is a happy number.

6561155620152 is a `hidden beast` number, since 6 + 5 + 6 + 1 + 1 + 5 + 5 + 620 + 15 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6561155620098 and 6561155620107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561155620153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342573738 + ... + 342592889.

It is an arithmetic number, because the mean of its divisors is an integer number (222679154100).

Almost surely, 2^{6561155620152} is an apocalyptic number.

It is an amenable number.

6561155620152 is an abundant number, since it is smaller than the sum of its proper divisors (14816043173448).

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

6561155620152 is a wasteful number, since it uses less digits than its factorization.

6561155620152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685166665 (or 685166658 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 6561155620152 in words is "six trillion, five hundred sixty-one billion, one hundred fifty-five million, six hundred twenty thousand, one hundred fifty-two".