61764647 has 12 divisors (see below), whose sum is σ = 71977320. Its totient is φ = 52846416.

The previous prime is 61764613. The next prime is 61764673. The reversal of 61764647 is 74646716.

It is a happy number.

It is not a de Polignac number, because 61764647 - 2⁶ = 61764583 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 (61764947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49313 + ... + 50549.

It is an arithmetic number, because the mean of its divisors is an integer number (5998110).

Almost surely, 2^61764647 is an apocalyptic number.

61764647 is a deficient number, since it is larger than the sum of its proper divisors (10212673).

61764647 is a wasteful number, since it uses less digits than its factorization.

61764647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2263 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 61764647 is about 7859.0487337845. The cubic root of 61764647 is about 395.2877185911.

The spelling of 61764647 in words is "sixty-one million, seven hundred sixty-four thousand, six hundred forty-seven".