261675146354551 has 8 divisors (see below), whose sum is σ = 264620016784800. Its totient is φ = 258730380374400.

The previous prime is 261675146354519. The next prime is 261675146354579. The reversal of 261675146354551 is 155453641576162.

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

It is a cyclic number.

It is not a de Polignac number, because 261675146354551 - 2⁵ = 261675146354519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261675146354551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261675146354051) 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, 21068350 + ... + 31100251.

It is an arithmetic number, because the mean of its divisors is an integer number (33077502098100).

Almost surely, 2^{261675146354551} is an apocalyptic number.

261675146354551 is a deficient number, since it is larger than the sum of its proper divisors (2944870430249).

261675146354551 is an equidigital number, since it uses as much as digits as its factorization.

261675146354551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52225049.

The product of its digits is 90720000, while the sum is 61.

The spelling of 261675146354551 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, one hundred forty-six million, three hundred fifty-four thousand, five hundred fifty-one".