61788853 has 24 divisors (see below), whose sum is σ = 74623032. Its totient is φ = 50972544.

The previous prime is 61788851. The next prime is 61788869. The reversal of 61788853 is 35888716.

It can be written as a sum of positive squares in 4 ways, for example, as 52896529 + 8892324 = 7273^2 + 2982^2 .

It is not a de Polignac number, because 61788853 - 2¹ = 61788851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61788851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313551 + ... + 313747.

It is an arithmetic number, because the mean of its divisors is an integer number (3109293).

Almost surely, 2^61788853 is an apocalyptic number.

It is an amenable number.

61788853 is a deficient number, since it is larger than the sum of its proper divisors (12834179).

61788853 is a wasteful number, since it uses less digits than its factorization.

61788853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 414 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 61788853 is about 7860.5885911934. The cubic root of 61788853 is about 395.3393505267.

The spelling of 61788853 in words is "sixty-one million, seven hundred eighty-eight thousand, eight hundred fifty-three".