261042797040700 has 36 divisors (see below), whose sum is σ = 568507861947592. Its totient is φ = 104040161697600.

The previous prime is 261042797040689. The next prime is 261042797040733. The reversal of 261042797040700 is 7040797240162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4711936146 + ... + 4711991545.

Almost surely, 2^{261042797040700} is an apocalyptic number.

261042797040700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261042797040700 is an abundant number, since it is smaller than the sum of its proper divisors (307465064906892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261042797040700 is a wasteful number, since it uses less digits than its factorization.

261042797040700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423927982 (or 9423927975 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 261042797040700 in words is "two hundred sixty-one trillion, forty-two billion, seven hundred ninety-seven million, forty thousand, seven hundred".