61005501 has 16 divisors (see below), whose sum is σ = 90529920. Its totient is φ = 40602240.

The previous prime is 61005487. The next prime is 61005541. The reversal of 61005501 is 10550016.

61005501 is a `hidden beast` number, since 610 + 0 + 5 + 50 + 1 = 666.

It is not a de Polignac number, because 61005501 - 2¹⁰ = 61004477 is a prime.

It is a super-2 number, since 2×61005501² = 7443342304522002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005541) 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 15 ways as a sum of consecutive naturals, for example, 18541 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (5658120).

Almost surely, 2^61005501 is an apocalyptic number.

It is an amenable number.

61005501 is a deficient number, since it is larger than the sum of its proper divisors (29524419).

61005501 is a wasteful number, since it uses less digits than its factorization.

61005501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793 (or 3787 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 61005501 is about 7810.6018334057. The cubic root of 61005501 is about 393.6615511081.

Adding to 61005501 its reverse (10550016), we get a palindrome (71555517).

The spelling of 61005501 in words is "sixty-one million, five thousand, five hundred one".