61825819 has 4 divisors (see below), whose sum is σ = 67446360. Its totient is φ = 56205280.

The previous prime is 61825807. The next prime is 61825847. The reversal of 61825819 is 91852816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61825819 - 2⁹ = 61825307 is a prime.

It is a super-2 number, since 2×61825819² = 7644863790041522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61825849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2810254 + ... + 2810275.

It is an arithmetic number, because the mean of its divisors is an integer number (16861590).

Almost surely, 2^61825819 is an apocalyptic number.

61825819 is a deficient number, since it is larger than the sum of its proper divisors (5620541).

61825819 is a wasteful number, since it uses less digits than its factorization.

61825819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620540.

The product of its digits is 34560, while the sum is 40.

The square root of 61825819 is about 7862.9395902550. The cubic root of 61825819 is about 395.4181738113.

The spelling of 61825819 in words is "sixty-one million, eight hundred twenty-five thousand, eight hundred nineteen".