7156553643225 has 288 divisors, whose sum is σ = 15164656066560. Its totient is φ = 3158484295680.

The previous prime is 7156553643209. The next prime is 7156553643251. The reversal of 7156553643225 is 5223463556517.

7156553643225 is a `hidden beast` number, since 7 + 1 + 5 + 6 + 55 + 364 + 3 + 225 = 666.

7156553643225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7156553643225 - 2⁴ = 7156553643209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2130559096 + ... + 2130562454.

Almost surely, 2^{7156553643225} is an apocalyptic number.

7156553643225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7156553643225 is an abundant number, since it is smaller than the sum of its proper divisors (8008102423335).

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

7156553643225 is a wasteful number, since it uses less digits than its factorization.

7156553643225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781 (or 3773 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 54.

The spelling of 7156553643225 in words is "seven trillion, one hundred fifty-six billion, five hundred fifty-three million, six hundred forty-three thousand, two hundred twenty-five".