203453395656 has 96 divisors (see below), whose sum is σ = 587112745920. Its totient is φ = 57553516800.

The previous prime is 203453395643. The next prime is 203453395667. The reversal of 203453395656 is 656593354302.

It is a junction number, because it is equal to n+sod(n) for n = 203453395599 and 203453395608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654410 + ... + 1773126.

It is an arithmetic number, because the mean of its divisors is an integer number (6115757770).

Almost surely, 2^203453395656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203453395656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293556372960).

203453395656 is an abundant number, since it is smaller than the sum of its proper divisors (383659350264).

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

203453395656 is a wasteful number, since it uses less digits than its factorization.

203453395656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118935 (or 118830 counting only the distinct ones).

The product of its (nonzero) digits is 8748000, while the sum is 51.

The spelling of 203453395656 in words is "two hundred three billion, four hundred fifty-three million, three hundred ninety-five thousand, six hundred fifty-six".