261604761487270 has 16 divisors (see below), whose sum is σ = 470888772963120. Its totient is φ = 104641859642464.

The previous prime is 261604761487243. The next prime is 261604761487331. The reversal of 261604761487270 is 72784167406162.

It is a super-2 number, since 2×261604761487270² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261604761487199 and 261604761487208.

It is a congruent number.

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, 28951176 + ... + 36896884.

It is an arithmetic number, because the mean of its divisors is an integer number (29430548310195).

Almost surely, 2^{261604761487270} is an apocalyptic number.

261604761487270 is a deficient number, since it is larger than the sum of its proper divisors (209284011475850).

261604761487270 is a wasteful number, since it uses less digits than its factorization.

261604761487270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11238119.

The product of its (nonzero) digits is 37933056, while the sum is 61.

The spelling of 261604761487270 in words is "two hundred sixty-one trillion, six hundred four billion, seven hundred sixty-one million, four hundred eighty-seven thousand, two hundred seventy".