261227073609348 has 144 divisors (see below), whose sum is σ = 774293640865920. Its totient is φ = 67088814819840.

The previous prime is 261227073609343. The next prime is 261227073609349. The reversal of 261227073609348 is 843906370722162.

It is a happy number.

It is a super-2 number, since 2×261227073609348² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261227073609291 and 261227073609300.

It is not an unprimeable number, because it can be changed into a prime (261227073609343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143484211 + ... + 145293402.

It is an arithmetic number, because the mean of its divisors is an integer number (5377039172680).

Almost surely, 2^{261227073609348} is an apocalyptic number.

261227073609348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261227073609348 is an abundant number, since it is smaller than the sum of its proper divisors (513066567256572).

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

261227073609348 is a wasteful number, since it uses less digits than its factorization.

261227073609348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288777738 (or 288777725 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 60.

The spelling of 261227073609348 in words is "two hundred sixty-one trillion, two hundred twenty-seven billion, seventy-three million, six hundred nine thousand, three hundred forty-eight".