261227770330 has 16 divisors (see below), whose sum is σ = 470231816040. Its totient is φ = 104486257152.

The previous prime is 261227770313. The next prime is 261227770369. The reversal of 261227770330 is 33077722162.

It can be written as a sum of positive squares in 4 ways, for example, as 136739467089 + 124488303241 = 369783^2 + 352829^2 .

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, 376035 + ... + 814774.

Almost surely, 2^261227770330 is an apocalyptic number.

261227770330 is a deficient number, since it is larger than the sum of its proper divisors (209004045710).

261227770330 is a wasteful number, since it uses less digits than its factorization.

261227770330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212753.

The product of its (nonzero) digits is 148176, while the sum is 40.

The spelling of 261227770330 in words is "two hundred sixty-one billion, two hundred twenty-seven million, seven hundred seventy thousand, three hundred thirty".