261562653452653 has 8 divisors (see below), whose sum is σ = 298929553572672. Its totient is φ = 224195955025056.

The previous prime is 261562653452621. The next prime is 261562653452731. The reversal of 261562653452653 is 356254356265162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261562653452653 - 2⁵ = 261562653452621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261562653452591 and 261562653452600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261562653450653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47633875 + ... + 52840432.

It is an arithmetic number, because the mean of its divisors is an integer number (37366194196584).

Almost surely, 2^{261562653452653} is an apocalyptic number.

It is an amenable number.

261562653452653 is a deficient number, since it is larger than the sum of its proper divisors (37366900120019).

261562653452653 is a wasteful number, since it uses less digits than its factorization.

261562653452653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100846211.

The product of its digits is 233280000, while the sum is 61.

The spelling of 261562653452653 in words is "two hundred sixty-one trillion, five hundred sixty-two billion, six hundred fifty-three million, four hundred fifty-two thousand, six hundred fifty-three".