823728535530 has 16 divisors (see below), whose sum is σ = 1976948485344. Its totient is φ = 219660942800.

The previous prime is 823728535481. The next prime is 823728535549. The reversal of 823728535530 is 35535827328.

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, 13728808896 + ... + 13728808955.

It is an arithmetic number, because the mean of its divisors is an integer number (123559280334).

Almost surely, 2^823728535530 is an apocalyptic number.

823728535530 is an abundant number, since it is smaller than the sum of its proper divisors (1153219949814).

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

823728535530 is a wasteful number, since it uses less digits than its factorization.

823728535530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27457617861.

The product of its (nonzero) digits is 6048000, while the sum is 51.

The spelling of 823728535530 in words is "eight hundred twenty-three billion, seven hundred twenty-eight million, five hundred thirty-five thousand, five hundred thirty".