261650626 has 8 divisors (see below), whose sum is σ = 392626764. Its totient is φ = 130775040.

The previous prime is 261650603. The next prime is 261650639. The reversal of 261650626 is 626056162.

261650626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 204633025 + 57017601 = 14305^2 + 7551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261650626² = 136922100172383752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261650591 and 261650600.

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, 18255 + ... + 29266.

Almost surely, 2^261650626 is an apocalyptic number.

261650626 is a deficient number, since it is larger than the sum of its proper divisors (130976138).

261650626 is a wasteful number, since it uses less digits than its factorization.

261650626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50276.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 261650626 is about 16175.6182571177. The cubic root of 261650626 is about 639.5982390577.

The spelling of 261650626 in words is "two hundred sixty-one million, six hundred fifty thousand, six hundred twenty-six".