61420064 has 12 divisors (see below), whose sum is σ = 120920814. Its totient is φ = 30710016.

The previous prime is 61420063. The next prime is 61420067. The reversal of 61420064 is 46002416.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 5290000 = 7492^2 + 2300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959657 + ... + 959720.

Almost surely, 2^61420064 is an apocalyptic number.

It is an amenable number.

61420064 is a deficient number, since it is larger than the sum of its proper divisors (59500750).

61420064 is a wasteful number, since it uses less digits than its factorization.

61420064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919387 (or 1919379 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 61420064 is about 7837.0953803051. The cubic root of 61420064 is about 394.5512481058.

The spelling of 61420064 in words is "sixty-one million, four hundred twenty thousand, sixty-four".