61530756 has 24 divisors (see below), whose sum is σ = 164082240. Its totient is φ = 17580192.

The previous prime is 61530743. The next prime is 61530757. The reversal of 61530756 is 65703516.

It is not an unprimeable number, because it can be changed into a prime (61530757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366171 + ... + 366338.

It is an arithmetic number, because the mean of its divisors is an integer number (6836760).

Almost surely, 2^61530756 is an apocalyptic number.

It is an amenable number.

61530756 is an abundant number, since it is smaller than the sum of its proper divisors (102551484).

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

61530756 is a wasteful number, since it uses less digits than its factorization.

61530756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732523 (or 732521 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 61530756 is about 7844.1542565148. The cubic root of 61530756 is about 394.7881275756.

The spelling of 61530756 in words is "sixty-one million, five hundred thirty thousand, seven hundred fifty-six".