61650851 has 4 divisors (see below), whose sum is σ = 61676304. Its totient is φ = 61625400.

The previous prime is 61650829. The next prime is 61650881. The reversal of 61650851 is 15805616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61650851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650821) 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, 8660 + ... + 14081.

It is an arithmetic number, because the mean of its divisors is an integer number (15419076).

Almost surely, 2^61650851 is an apocalyptic number.

61650851 is a deficient number, since it is larger than the sum of its proper divisors (25453).

61650851 is a wasteful number, since it uses less digits than its factorization.

61650851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25452.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 61650851 is about 7851.8055885255. The cubic root of 61650851 is about 395.0448082480.

The spelling of 61650851 in words is "sixty-one million, six hundred fifty thousand, eight hundred fifty-one".