261202620503 has 6 divisors (see below), whose sum is σ = 287107012752. Its totient is φ = 237456927620.

The previous prime is 261202620491. The next prime is 261202620509. The reversal of 261202620503 is 305026202162.

It is a de Polignac number, because none of the positive numbers 2^k-261202620503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261202620509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1079349551 + ... + 1079349792.

It is an arithmetic number, because the mean of its divisors is an integer number (47851168792).

Almost surely, 2^261202620503 is an apocalyptic number.

261202620503 is a deficient number, since it is larger than the sum of its proper divisors (25904392249).

261202620503 is a wasteful number, since it uses less digits than its factorization.

261202620503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158699365 (or 2158699354 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 261202620503 its reverse (305026202162), we get a palindrome (566228822665).

The spelling of 261202620503 in words is "two hundred sixty-one billion, two hundred two million, six hundred twenty thousand, five hundred three".