261094190493 has 8 divisors (see below), whose sum is σ = 354693994848. Its totient is φ = 170778589904.

The previous prime is 261094190473. The next prime is 261094190501. The reversal of 261094190493 is 394091490162.

It is a happy number.

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 261094190493 - 2⁸ = 261094190237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261094190473) 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, 821050755 + ... + 821051072.

It is an arithmetic number, because the mean of its divisors is an integer number (44336749356).

Almost surely, 2^261094190493 is an apocalyptic number.

It is an amenable number.

261094190493 is a deficient number, since it is larger than the sum of its proper divisors (93599804355).

261094190493 is a wasteful number, since it uses less digits than its factorization.

261094190493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642101883.

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 261094190493 in words is "two hundred sixty-one billion, ninety-four million, one hundred ninety thousand, four hundred ninety-three".