61445419 has 16 divisors (see below), whose sum is σ = 72711936. Its totient is φ = 50824800.

The previous prime is 61445413. The next prime is 61445431. The reversal of 61445419 is 91454416.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61445419 - 2⁵ = 61445387 is a prime.

It is a super-2 number, since 2×61445419² = 7551079032171122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61445413) 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, 33024 + ... + 34834.

It is an arithmetic number, because the mean of its divisors is an integer number (4544496).

Almost surely, 2^61445419 is an apocalyptic number.

61445419 is a deficient number, since it is larger than the sum of its proper divisors (11266517).

61445419 is a wasteful number, since it uses less digits than its factorization.

61445419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its digits is 17280, while the sum is 34.

The square root of 61445419 is about 7838.7128407667. The cubic root of 61445419 is about 394.6055325963.

The spelling of 61445419 in words is "sixty-one million, four hundred forty-five thousand, four hundred nineteen".