61240064 has 36 divisors (see below), whose sum is σ = 123191880. Its totient is φ = 30382080.

The previous prime is 61240057. The next prime is 61240073. The reversal of 61240064 is 46004216.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34724 + ... + 36444.

Almost surely, 2^61240064 is an apocalyptic number.

61240064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61240064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61595940).

61240064 is an abundant number, since it is smaller than the sum of its proper divisors (61951816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61240064 is a wasteful number, since it uses less digits than its factorization.

61240064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1862 counting only the distinct ones).

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

The square root of 61240064 is about 7825.6031077483. The cubic root of 61240064 is about 394.1654419570.

The spelling of 61240064 in words is "sixty-one million, two hundred forty thousand, sixty-four".