261609962 has 8 divisors (see below), whose sum is σ = 392484036. Its totient is φ = 130781952.

The previous prime is 261609877. The next prime is 261609973. The reversal of 261609962 is 269906162.

It can be written as a sum of positive squares in 2 ways, for example, as 260854801 + 755161 = 16151^2 + 869^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 13928 + ... + 26780.

Almost surely, 2^261609962 is an apocalyptic number.

261609962 is a deficient number, since it is larger than the sum of its proper divisors (130874074).

261609962 is a wasteful number, since it uses less digits than its factorization.

261609962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23032.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 261609962 is about 16174.3612547760. The cubic root of 261609962 is about 639.5651033063.

The spelling of 261609962 in words is "two hundred sixty-one million, six hundred nine thousand, nine hundred sixty-two".