261657100655332 has 12 divisors (see below), whose sum is σ = 484835215920300. Its totient is φ = 123132753249536.

The previous prime is 261657100655243. The next prime is 261657100655359. The reversal of 261657100655332 is 233556001756162.

It can be written as a sum of positive squares in 2 ways, for example, as 87713077256676 + 173944023398656 = 9365526^2 + 13188784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261657100655332.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923949269457 + ... + 1923949269592.

It is an arithmetic number, because the mean of its divisors is an integer number (40402934660025).

Almost surely, 2^{261657100655332} is an apocalyptic number.

It is an amenable number.

261657100655332 is a deficient number, since it is larger than the sum of its proper divisors (223178115264968).

261657100655332 is a wasteful number, since it uses less digits than its factorization.

261657100655332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847898539070 (or 3847898539068 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 261657100655332 in words is "two hundred sixty-one trillion, six hundred fifty-seven billion, one hundred million, six hundred fifty-five thousand, three hundred thirty-two".