61764769 has 8 divisors (see below), whose sum is σ = 68651712. Its totient is φ = 55089840.

The previous prime is 61764743. The next prime is 61764793. The reversal of 61764769 is 96746716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61764769 is a prime.

It is a super-2 number, since 2×61764769² = 7629773379246722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61764709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52389 + ... + 53554.

It is an arithmetic number, because the mean of its divisors is an integer number (8581464).

Almost surely, 2^61764769 is an apocalyptic number.

It is an amenable number.

61764769 is a deficient number, since it is larger than the sum of its proper divisors (6886943).

61764769 is a wasteful number, since it uses less digits than its factorization.

61764769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106007.

The product of its digits is 381024, while the sum is 46.

The square root of 61764769 is about 7859.0564955343. The cubic root of 61764769 is about 395.2879788536.

It can be divided in two parts, 617647 and 69, that added together give a palindrome (617716).

The spelling of 61764769 in words is "sixty-one million, seven hundred sixty-four thousand, seven hundred sixty-nine".