61826769 has 9 divisors (see below), whose sum is σ = 89339419. Its totient is φ = 41202120.

The previous prime is 61826767. The next prime is 61826813. The reversal of 61826769 is 96762816.

The square root of 61826769 is 7863.

It is a perfect power (a square), and thus also a powerful number.

61826769 is a `hidden beast` number, since 618 + 26 + 7 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50936769 + 10890000 = 7137^2 + 3300^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 61826769 - 2¹ = 61826767 is a prime.

It is a super-2 number, since 2×61826769² = 7645098729958722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61826767) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22279 + ... + 24899.

Almost surely, 2^61826769 is an apocalyptic number.

61826769 is the 7863-rd square number.

61826769 is the 3932-nd centered octagonal number.

It is an amenable number.

61826769 is a deficient number, since it is larger than the sum of its proper divisors (27512650).

61826769 is an frugal number, since it uses more digits than its factorization.

61826769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 2624 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The cubic root of 61826769 is about 395.4201990997.

The spelling of 61826769 in words is "sixty-one million, eight hundred twenty-six thousand, seven hundred sixty-nine".