61388785 has 16 divisors (see below), whose sum is σ = 78212736. Its totient is φ = 46096128.

The previous prime is 61388783. The next prime is 61388797. The reversal of 61388785 is 58788316.

It is a cyclic number.

It is not a de Polignac number, because 61388785 - 2¹ = 61388783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61388783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40654 + ... + 42136.

It is an arithmetic number, because the mean of its divisors is an integer number (4888296).

Almost surely, 2^61388785 is an apocalyptic number.

It is an amenable number.

61388785 is a deficient number, since it is larger than the sum of its proper divisors (16823951).

61388785 is a wasteful number, since it uses less digits than its factorization.

61388785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

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

The square root of 61388785 is about 7835.0995526541. The cubic root of 61388785 is about 394.4842598762.

It can be divided in two parts, 613 and 88785, that added together give a palindrome (89398).

The spelling of 61388785 in words is "sixty-one million, three hundred eighty-eight thousand, seven hundred eighty-five".