261121024340 has 48 divisors (see below), whose sum is σ = 609491433600. Its totient is φ = 93161527680.

The previous prime is 261121024327. The next prime is 261121024343. The reversal of 261121024340 is 43420121162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261121024343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11185640 + ... + 11208959.

It is an arithmetic number, because the mean of its divisors is an integer number (12697738200).

Almost surely, 2^261121024340 is an apocalyptic number.

261121024340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261121024340 is an abundant number, since it is smaller than the sum of its proper divisors (348370409260).

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

261121024340 is a wasteful number, since it uses less digits than its factorization.

261121024340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22394672 (or 22394670 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 261121024340 in words is "two hundred sixty-one billion, one hundred twenty-one million, twenty-four thousand, three hundred forty".