261563350453675 has 6 divisors (see below), whose sum is σ = 324338554562588. Its totient is φ = 209250680362920.

The previous prime is 261563350453627. The next prime is 261563350453693. The reversal of 261563350453675 is 576354053365162.

It is not a de Polignac number, because 261563350453675 - 2²¹ = 261563348356523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5231267009049 + ... + 5231267009098.

Almost surely, 2^{261563350453675} is an apocalyptic number.

261563350453675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261563350453675 is a deficient number, since it is larger than the sum of its proper divisors (62775204108913).

261563350453675 is a wasteful number, since it uses less digits than its factorization.

261563350453675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462534018157 (or 10462534018152 counting only the distinct ones).

The product of its (nonzero) digits is 204120000, while the sum is 61.

The spelling of 261563350453675 in words is "two hundred sixty-one trillion, five hundred sixty-three billion, three hundred fifty million, four hundred fifty-three thousand, six hundred seventy-five".