61770789 has 8 divisors (see below), whose sum is σ = 91512320. Its totient is φ = 41180508.

The previous prime is 61770763. The next prime is 61770799. The reversal of 61770789 is 98707716.

It is a happy number.

61770789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61770789 - 2⁵ = 61770757 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 (61770799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143877 + ... + 1143930.

It is an arithmetic number, because the mean of its divisors is an integer number (11439040).

Almost surely, 2^61770789 is an apocalyptic number.

It is an amenable number.

61770789 is a deficient number, since it is larger than the sum of its proper divisors (29741531).

61770789 is a wasteful number, since it uses less digits than its factorization.

61770789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287816 (or 2287810 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 61770789 is about 7859.4394838309. The cubic root of 61770789 is about 395.3008208905.

It can be divided in two parts, 617707 and 89, that added together give a square (617796 = 786²).

The spelling of 61770789 in words is "sixty-one million, seven hundred seventy thousand, seven hundred eighty-nine".