261063542360 has 64 divisors (see below), whose sum is σ = 620607420000. Its totient is φ = 98561498112.

The previous prime is 261063542351. The next prime is 261063542407. The reversal of 261063542360 is 63245360162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434045 + ... + 842924.

Almost surely, 2^261063542360 is an apocalyptic number.

261063542360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261063542360 is an abundant number, since it is smaller than the sum of its proper divisors (359543877640).

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

261063542360 is a wasteful number, since it uses less digits than its factorization.

261063542360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277268 (or 1277264 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 261063542360 in words is "two hundred sixty-one billion, sixty-three million, five hundred forty-two thousand, three hundred sixty".