61400061 has 12 divisors (see below), whose sum is σ = 90192960. Its totient is φ = 40239240.

The previous prime is 61400033. The next prime is 61400063. The reversal of 61400061 is 16000416.

It is not a de Polignac number, because 61400061 - 2⁹ = 61399549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61400063) 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 11 ways as a sum of consecutive naturals, for example, 57285 + ... + 58346.

It is an arithmetic number, because the mean of its divisors is an integer number (7516080).

Almost surely, 2^61400061 is an apocalyptic number.

It is an amenable number.

61400061 is a deficient number, since it is larger than the sum of its proper divisors (28792899).

61400061 is a wasteful number, since it uses less digits than its factorization.

61400061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115696 (or 115693 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61400061 is about 7835.8191020467. The cubic root of 61400061 is about 394.5084115851.

Adding to 61400061 its reverse (16000416), we get a palindrome (77400477).

The spelling of 61400061 in words is "sixty-one million, four hundred thousand, sixty-one".