61556506 has 8 divisors (see below), whose sum is σ = 100728864. Its totient is φ = 27980220.

The previous prime is 61556501. The next prime is 61556513. The reversal of 61556506 is 60565516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61556501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398990 + ... + 1399033.

It is an arithmetic number, because the mean of its divisors is an integer number (12591108).

Almost surely, 2^61556506 is an apocalyptic number.

61556506 is a deficient number, since it is larger than the sum of its proper divisors (39172358).

61556506 is a wasteful number, since it uses less digits than its factorization.

61556506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798036.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 61556506 is about 7845.7954344987. The cubic root of 61556506 is about 394.8431915099.

It can be divided in two parts, 615 and 56506, that added together give a square (57121 = 239²).

The spelling of 61556506 in words is "sixty-one million, five hundred fifty-six thousand, five hundred six".