261058632943 has 4 divisors (see below), whose sum is σ = 262517061240. Its totient is φ = 259600204648.

The previous prime is 261058632937. The next prime is 261058633049. The reversal of 261058632943 is 349236850162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261058632943 - 2¹³ = 261058624751 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 (261052632943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729213880 + ... + 729214237.

It is an arithmetic number, because the mean of its divisors is an integer number (65629265310).

Almost surely, 2^261058632943 is an apocalyptic number.

261058632943 is a deficient number, since it is larger than the sum of its proper divisors (1458428297).

261058632943 is a wasteful number, since it uses less digits than its factorization.

261058632943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458428296.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 261058632943 in words is "two hundred sixty-one billion, fifty-eight million, six hundred thirty-two thousand, nine hundred forty-three".