61550011 has 4 divisors (see below), whose sum is σ = 62114800. Its totient is φ = 60985224.

The previous prime is 61549967. The next prime is 61550033. The reversal of 61550011 is 11005516.

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 61550011 - 2⁷ = 61549883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61550311) 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 3 ways as a sum of consecutive naturals, for example, 282231 + ... + 282448.

It is an arithmetic number, because the mean of its divisors is an integer number (15528700).

Almost surely, 2^61550011 is an apocalyptic number.

61550011 is a deficient number, since it is larger than the sum of its proper divisors (564789).

61550011 is a wasteful number, since it uses less digits than its factorization.

61550011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564788.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 61550011 is about 7845.3815076133. The cubic root of 61550011 is about 394.8293040164.

Adding to 61550011 its reverse (11005516), we get a palindrome (72555527).

The spelling of 61550011 in words is "sixty-one million, five hundred fifty thousand, eleven".