61455548 has 48 divisors (see below), whose sum is σ = 136324608. Its totient is φ = 23544000.

The previous prime is 61455539. The next prime is 61455551. The reversal of 61455548 is 84555416.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17153 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (2840096).

Almost surely, 2^61455548 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 61455548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68162304).

61455548 is an abundant number, since it is smaller than the sum of its proper divisors (74869060).

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

61455548 is a wasteful number, since it uses less digits than its factorization.

61455548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354 (or 3352 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 61455548 is about 7839.3589023593. The cubic root of 61455548 is about 394.6272143853.

The spelling of 61455548 in words is "sixty-one million, four hundred fifty-five thousand, five hundred forty-eight".