261770036655252 has 192 divisors, whose sum is σ = 634909835427840. Its totient is φ = 83879228160000.

The previous prime is 261770036655247. The next prime is 261770036655269. The reversal of 261770036655252 is 252556630077162.

It is a junction number, because it is equal to n+sod(n) for n = 261770036655192 and 261770036655201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60919252368 + ... + 60919256664.

It is an arithmetic number, because the mean of its divisors is an integer number (3306822059520).

Almost surely, 2^{261770036655252} is an apocalyptic number.

It is an amenable number.

261770036655252 is an abundant number, since it is smaller than the sum of its proper divisors (373139798772588).

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

261770036655252 is a wasteful number, since it uses less digits than its factorization.

261770036655252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262 (or 7260 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 57.

The spelling of 261770036655252 in words is "two hundred sixty-one trillion, seven hundred seventy billion, thirty-six million, six hundred fifty-five thousand, two hundred fifty-two".