61554984 has 32 divisors (see below), whose sum is σ = 161988000. Its totient is φ = 19438272.

The previous prime is 61554979. The next prime is 61554991. The reversal of 61554984 is 48945516.

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 7 ways as a sum of consecutive naturals, for example, 67039 + ... + 67950.

It is an arithmetic number, because the mean of its divisors is an integer number (5062125).

Almost surely, 2^61554984 is an apocalyptic number.

It is an amenable number.

61554984 is an abundant number, since it is smaller than the sum of its proper divisors (100433016).

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

61554984 is a wasteful number, since it uses less digits than its factorization.

61554984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135017 (or 135013 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 61554984 is about 7845.6984392723. The cubic root of 61554984 is about 394.8399372842.

The spelling of 61554984 in words is "sixty-one million, five hundred fifty-four thousand, nine hundred eighty-four".