203106306652656 has 160 divisors (see below), whose sum is σ = 576872962338816. Its totient is φ = 61065564768000.

The previous prime is 203106306652651. The next prime is 203106306652687. The reversal of 203106306652656 is 656256603601302.

It is a junction number, because it is equal to n+sod(n) for n = 203106306652599 and 203106306652608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203106306652651) 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, 355722441 + ... + 356292951.

Almost surely, 2^{203106306652656} 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 203106306652656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288436481169408).

203106306652656 is an abundant number, since it is smaller than the sum of its proper divisors (373766655686160).

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

203106306652656 is a wasteful number, since it uses less digits than its factorization.

203106306652656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575811 (or 575805 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 51.

The spelling of 203106306652656 in words is "two hundred three trillion, one hundred six billion, three hundred six million, six hundred fifty-two thousand, six hundred fifty-six".