261154602042 has 8 divisors (see below), whose sum is σ = 522309204096. Its totient is φ = 87051534012.

The previous prime is 261154602017. The next prime is 261154602047. The reversal of 261154602042 is 240206451162.

It is a sphenic number, since it is the product of 3 distinct primes.

261154602042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 261154601994 and 261154602012.

It is not an unprimeable number, because it can be changed into a prime (261154602047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21762883498 + ... + 21762883509.

It is an arithmetic number, because the mean of its divisors is an integer number (65288650512).

Almost surely, 2^261154602042 is an apocalyptic number.

261154602042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261154602042 is a wasteful number, since it uses less digits than its factorization.

261154602042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43525767012.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 261154602042 in words is "two hundred sixty-one billion, one hundred fifty-four million, six hundred two thousand, forty-two".