202861261655 has 24 divisors (see below), whose sum is σ = 263824102080. Its totient is φ = 149677656960.

The previous prime is 202861261649. The next prime is 202861261657. The reversal of 202861261655 is 556162168202.

It is a happy number.

It is not a de Polignac number, because 202861261655 - 2⁶ = 202861261591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202861261657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 896306 + ... + 1099584.

It is an arithmetic number, because the mean of its divisors is an integer number (10992670920).

Almost surely, 2^202861261655 is an apocalyptic number.

202861261655 is a deficient number, since it is larger than the sum of its proper divisors (60962840425).

202861261655 is a wasteful number, since it uses less digits than its factorization.

202861261655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204491 (or 204478 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 202861261655 in words is "two hundred two billion, eight hundred sixty-one million, two hundred sixty-one thousand, six hundred fifty-five".