61455808 has 28 divisors (see below), whose sum is σ = 122927872. Its totient is φ = 30481920.

The previous prime is 61455787. The next prime is 61455809. The reversal of 61455808 is 80855416.

61455808 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61455809) 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, 4348 + ... + 11908.

Almost surely, 2^61455808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61455808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61463936).

61455808 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61455808 is a wasteful number, since it uses less digits than its factorization.

61455808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7700 (or 7690 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 61455808 is about 7839.3754853304. The cubic root of 61455808 is about 394.6277709010.

The spelling of 61455808 in words is "sixty-one million, four hundred fifty-five thousand, eight hundred eight".