61817408 has 28 divisors (see below), whose sum is σ = 125284992. Its totient is φ = 30249600.

The previous prime is 61817387. The next prime is 61817411. The reversal of 61817408 is 80471816.

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 3 ways as a sum of consecutive naturals, for example, 7268 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (4474464).

Almost surely, 2^61817408 is an apocalyptic number.

It is an amenable number.

61817408 is an abundant number, since it is smaller than the sum of its proper divisors (63467584).

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

61817408 is a wasteful number, since it uses less digits than its factorization.

61817408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20610 (or 20600 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 61817408 is about 7862.4047212033. The cubic root of 61817408 is about 395.4002416423.

The spelling of 61817408 in words is "sixty-one million, eight hundred seventeen thousand, four hundred eight".