643248148512 has 48 divisors (see below), whose sum is σ = 1729709970912. Its totient is φ = 209186388480.

The previous prime is 643248148457. The next prime is 643248148541. The reversal of 643248148512 is 215841842346.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81709498 + ... + 81717369.

It is an arithmetic number, because the mean of its divisors is an integer number (36035624394).

Almost surely, 2^643248148512 is an apocalyptic number.

It is an amenable number.

643248148512 is an abundant number, since it is smaller than the sum of its proper divisors (1086461822400).

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

643248148512 is a wasteful number, since it uses less digits than its factorization.

643248148512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163426921 (or 163426913 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The spelling of 643248148512 in words is "six hundred forty-three billion, two hundred forty-eight million, one hundred forty-eight thousand, five hundred twelve".