61650261 has 16 divisors (see below), whose sum is σ = 93459520. Its totient is φ = 40143600.

The previous prime is 61650247. The next prime is 61650263. The reversal of 61650261 is 16205616.

It is a happy number.

61650261 is a `hidden beast` number, since 6 + 1 + 650 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 61650261 - 2⁷ = 61650133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25390 + ... + 27711.

It is an arithmetic number, because the mean of its divisors is an integer number (5841220).

Almost surely, 2^61650261 is an apocalyptic number.

It is an amenable number.

61650261 is a deficient number, since it is larger than the sum of its proper divisors (31809259).

61650261 is a wasteful number, since it uses less digits than its factorization.

61650261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53153 (or 53147 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 61650261 is about 7851.7680174595. The cubic root of 61650261 is about 395.0435480482.

Adding to 61650261 its reverse (16205616), we get a palindrome (77855877).

The spelling of 61650261 in words is "sixty-one million, six hundred fifty thousand, two hundred sixty-one".