261598740494 has 96 divisors (see below), whose sum is σ = 496916259840. Its totient is φ = 102368290752.

The previous prime is 261598740479. The next prime is 261598740551. The reversal of 261598740494 is 494047895162.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141633479 + ... + 141635325.

It is an arithmetic number, because the mean of its divisors is an integer number (5176211040).

Almost surely, 2^261598740494 is an apocalyptic number.

261598740494 is a deficient number, since it is larger than the sum of its proper divisors (235317519346).

261598740494 is a wasteful number, since it uses less digits than its factorization.

261598740494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 261598740494 in words is "two hundred sixty-one billion, five hundred ninety-eight million, seven hundred forty thousand, four hundred ninety-four".