61554144 has 48 divisors (see below), whose sum is σ = 171088848. Its totient is φ = 19310592.

The previous prime is 61554133. The next prime is 61554191. The reversal of 61554144 is 44145516.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17227 + ... + 20490.

It is an arithmetic number, because the mean of its divisors is an integer number (3564351).

Almost surely, 2^61554144 is an apocalyptic number.

It is an amenable number.

61554144 is an abundant number, since it is smaller than the sum of its proper divisors (109534704).

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

61554144 is a wasteful number, since it uses less digits than its factorization.

61554144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37747 (or 37739 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 61554144 is about 7845.6449065708. The cubic root of 61554144 is about 394.8381412366.

The spelling of 61554144 in words is "sixty-one million, five hundred fifty-four thousand, one hundred forty-four".