261316140142 has 8 divisors (see below), whose sum is σ = 392744298600. Its totient is φ = 130401373944.

The previous prime is 261316140053. The next prime is 261316140143. The reversal of 261316140142 is 241041613162.

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

It is a super-2 number, since 2×261316140142² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261316140143) 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, 128346792 + ... + 128348827.

It is an arithmetic number, because the mean of its divisors is an integer number (49093037325).

Almost surely, 2^261316140142 is an apocalyptic number.

261316140142 is a deficient number, since it is larger than the sum of its proper divisors (131428158458).

261316140142 is a wasteful number, since it uses less digits than its factorization.

261316140142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256696130.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 261316140142 in words is "two hundred sixty-one billion, three hundred sixteen million, one hundred forty thousand, one hundred forty-two".