261000535355403 has 32 divisors (see below), whose sum is σ = 358804238472960. Its totient is φ = 168635754161280.

The previous prime is 261000535355363. The next prime is 261000535355423. The reversal of 261000535355403 is 304553535000162.

It is not a de Polignac number, because 261000535355403 - 2²⁴ = 261000518578187 is a prime.

It is a super-3 number, since 3×261000535355403³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261000535355423) 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, 101144068 + ... + 103692446.

It is an arithmetic number, because the mean of its divisors is an integer number (11212632452280).

Almost surely, 2^{261000535355403} is an apocalyptic number.

261000535355403 is a deficient number, since it is larger than the sum of its proper divisors (97803703117557).

261000535355403 is a wasteful number, since it uses less digits than its factorization.

261000535355403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552027.

The product of its (nonzero) digits is 810000, while the sum is 42.

The spelling of 261000535355403 in words is "two hundred sixty-one trillion, five hundred thirty-five million, three hundred fifty-five thousand, four hundred three".