261421771035701 has 8 divisors (see below), whose sum is σ = 261697511718720. Its totient is φ = 261146144657088.

The previous prime is 261421771035539. The next prime is 261421771035727. The reversal of 261421771035701 is 107530177124162.

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 261421771035701 - 2³⁸ = 261146893128757 is a prime.

It is a super-2 number, since 2×261421771035701² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261421771037701) 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, 23999171 + ... + 33148208.

It is an arithmetic number, because the mean of its divisors is an integer number (32712188964840).

Almost surely, 2^{261421771035701} is an apocalyptic number.

It is an amenable number.

261421771035701 is a deficient number, since it is larger than the sum of its proper divisors (275740683019).

261421771035701 is a wasteful number, since it uses less digits than its factorization.

261421771035701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57152203.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 261421771035701 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, seven hundred seventy-one million, thirty-five thousand, seven hundred one".