261123662 has 8 divisors (see below), whose sum is σ = 393396600. Its totient is φ = 129991464.

The previous prime is 261123659. The next prime is 261123671. The reversal of 261123662 is 266321162.

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

It is a congruent number.

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, 284612 + ... + 285527.

It is an arithmetic number, because the mean of its divisors is an integer number (49174575).

Almost surely, 2^261123662 is an apocalyptic number.

261123662 is a deficient number, since it is larger than the sum of its proper divisors (132272938).

261123662 is a wasteful number, since it uses less digits than its factorization.

261123662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570370.

The product of its digits is 5184, while the sum is 29.

The square root of 261123662 is about 16159.3212109915. The cubic root of 261123662 is about 639.1685671517.

The spelling of 261123662 in words is "two hundred sixty-one million, one hundred twenty-three thousand, six hundred sixty-two".