61628851 has 4 divisors (see below), whose sum is σ = 62321400. Its totient is φ = 60936304.

The previous prime is 61628843. The next prime is 61628873. The reversal of 61628851 is 15882616.

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

It is a cyclic number.

It is not a de Polignac number, because 61628851 - 2³ = 61628843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61628851.

It is not an unprimeable number, because it can be changed into a prime (61628821) 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, 346141 + ... + 346318.

It is an arithmetic number, because the mean of its divisors is an integer number (15580350).

Almost surely, 2^61628851 is an apocalyptic number.

61628851 is a deficient number, since it is larger than the sum of its proper divisors (692549).

61628851 is an equidigital number, since it uses as much as digits as its factorization.

61628851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692548.

The product of its digits is 23040, while the sum is 37.

The square root of 61628851 is about 7850.4045118707. The cubic root of 61628851 is about 394.9978123043.

The spelling of 61628851 in words is "sixty-one million, six hundred twenty-eight thousand, eight hundred fifty-one".