643553115153 has 32 divisors (see below), whose sum is σ = 972778988160. Its totient is φ = 375162969600.

The previous prime is 643553115151. The next prime is 643553115157. The reversal of 643553115153 is 351511355346.

It is not a de Polignac number, because 643553115153 - 2¹ = 643553115151 is a prime.

It is a super-2 number, since 2×643553115153² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643553115151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18161253 + ... + 18196653.

It is an arithmetic number, because the mean of its divisors is an integer number (30399343380).

Almost surely, 2^643553115153 is an apocalyptic number.

It is an amenable number.

643553115153 is a deficient number, since it is larger than the sum of its proper divisors (329225873007).

643553115153 is a wasteful number, since it uses less digits than its factorization.

643553115153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59969.

The product of its digits is 405000, while the sum is 42.

The spelling of 643553115153 in words is "six hundred forty-three billion, five hundred fifty-three million, one hundred fifteen thousand, one hundred fifty-three".