61506040 has 32 divisors (see below), whose sum is σ = 145674000. Its totient is φ = 23307264.

The previous prime is 61506037. The next prime is 61506041. The reversal of 61506040 is 4060516.

61506040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39705 + ... + 41224.

Almost surely, 2^61506040 is an apocalyptic number.

It is an amenable number.

61506040 is an abundant number, since it is smaller than the sum of its proper divisors (84167960).

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

61506040 is a wasteful number, since it uses less digits than its factorization.

61506040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80959 (or 80955 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 61506040 is about 7842.5786575590. The cubic root of 61506040 is about 394.7352603009.

Adding to 61506040 its reverse (4060516), we get a palindrome (65566556).

The spelling of 61506040 in words is "sixty-one million, five hundred six thousand, forty".