61650817 has 4 divisors (see below), whose sum is σ = 61673920. Its totient is φ = 61627716.

The previous prime is 61650709. The next prime is 61650821. The reversal of 61650817 is 71805616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61650817 - 2¹⁹ = 61126529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6933 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (15418480).

Almost surely, 2^61650817 is an apocalyptic number.

It is an amenable number.

61650817 is a deficient number, since it is larger than the sum of its proper divisors (23103).

61650817 is a wasteful number, since it uses less digits than its factorization.

61650817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23102.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61650817 is about 7851.8034234181. The cubic root of 61650817 is about 395.0447356266.

The spelling of 61650817 in words is "sixty-one million, six hundred fifty thousand, eight hundred seventeen".