61452809 has 16 divisors (see below), whose sum is σ = 69491520. Its totient is φ = 53856000.

The previous prime is 61452791. The next prime is 61452817. The reversal of 61452809 is 90825416.

It is not a de Polignac number, because 61452809 - 2⁸ = 61452553 is a prime.

It is a super-3 number, since 3×61452809³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61452889) 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, 39374 + ... + 40904.

It is an arithmetic number, because the mean of its divisors is an integer number (4343220).

Almost surely, 2^61452809 is an apocalyptic number.

It is an amenable number.

61452809 is a deficient number, since it is larger than the sum of its proper divisors (8038711).

61452809 is a wasteful number, since it uses less digits than its factorization.

61452809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 61452809 is about 7839.1842050050. The cubic root of 61452809 is about 394.6213516111.

The spelling of 61452809 in words is "sixty-one million, four hundred fifty-two thousand, eight hundred nine".