261451056035541 has 8 divisors (see below), whose sum is σ = 350740066993120. Its totient is φ = 173231374550832.

The previous prime is 261451056035509. The next prime is 261451056035567. The reversal of 261451056035541 is 145530650154162.

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

It is not a de Polignac number, because 261451056035541 - 2⁵ = 261451056035509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261451056037541) 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, 267332367646 + ... + 267332368623.

It is an arithmetic number, because the mean of its divisors is an integer number (43842508374140).

Almost surely, 2^{261451056035541} is an apocalyptic number.

It is an amenable number.

261451056035541 is a deficient number, since it is larger than the sum of its proper divisors (89289010957579).

261451056035541 is a wasteful number, since it uses less digits than its factorization.

261451056035541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534664736435.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 261451056035541 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, fifty-six million, thirty-five thousand, five hundred forty-one".