261063620 has 24 divisors (see below), whose sum is σ = 550658304. Its totient is φ = 103963616.

The previous prime is 261063599. The next prime is 261063631. The reversal of 261063620 is 26360162.

It is a self number, because there is not a number n which added to its sum of digits gives 261063620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24212 + ... + 33291.

It is an arithmetic number, because the mean of its divisors is an integer number (22944096).

Almost surely, 2^261063620 is an apocalyptic number.

261063620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261063620 is an abundant number, since it is smaller than the sum of its proper divisors (289594684).

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

261063620 is a wasteful number, since it uses less digits than its factorization.

261063620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57739 (or 57737 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 261063620 is about 16157.4632909996. The cubic root of 261063620 is about 639.1195738885.

The spelling of 261063620 in words is "two hundred sixty-one million, sixty-three thousand, six hundred twenty".