61858649 has 8 divisors (see below), whose sum is σ = 62765280. Its totient is φ = 60956896.

The previous prime is 61858619. The next prime is 61858673. The reversal of 61858649 is 94685816.

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

It is a cyclic number.

It is not a de Polignac number, because 61858649 - 2¹² = 61854553 is a prime.

It is a super-2 number, since 2×61858649² = 7652984912210402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61858619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29882 + ... + 31884.

It is an arithmetic number, because the mean of its divisors is an integer number (7845660).

Almost surely, 2^61858649 is an apocalyptic number.

It is an amenable number.

61858649 is a deficient number, since it is larger than the sum of its proper divisors (906631).

61858649 is a wasteful number, since it uses less digits than its factorization.

61858649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 414720, while the sum is 47.

The square root of 61858649 is about 7865.0269548171. The cubic root of 61858649 is about 395.4881514881.

The spelling of 61858649 in words is "sixty-one million, eight hundred fifty-eight thousand, six hundred forty-nine".