61556628 has 24 divisors (see below), whose sum is σ = 164151232. Its totient is φ = 17587584.

The previous prime is 61556623. The next prime is 61556639. The reversal of 61556628 is 82665516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61556623) 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, 366325 + ... + 366492.

Almost surely, 2^61556628 is an apocalyptic number.

It is an amenable number.

61556628 is an abundant number, since it is smaller than the sum of its proper divisors (102594604).

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

61556628 is a wasteful number, since it uses less digits than its factorization.

61556628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732831 (or 732829 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 61556628 is about 7845.8032093598. The cubic root of 61556628 is about 394.8434523588.

The spelling of 61556628 in words is "sixty-one million, five hundred fifty-six thousand, six hundred twenty-eight".