261240616600503 has 16 divisors (see below), whose sum is σ = 358025976624480. Its totient is φ = 169315493774976.

The previous prime is 261240616600493. The next prime is 261240616600507. The reversal of 261240616600503 is 305006616042162.

It is not a de Polignac number, because 261240616600503 - 2⁴ = 261240616600487 is a prime.

It is a super-2 number, since 2×261240616600503² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261240616600507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957357100 + ... + 957629937.

It is an arithmetic number, because the mean of its divisors is an integer number (22376623539030).

Almost surely, 2^{261240616600503} is an apocalyptic number.

261240616600503 is a deficient number, since it is larger than the sum of its proper divisors (96785360023977).

261240616600503 is a wasteful number, since it uses less digits than its factorization.

261240616600503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914988306.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 261240616600503 in words is "two hundred sixty-one trillion, two hundred forty billion, six hundred sixteen million, six hundred thousand, five hundred three".