61323144 has 16 divisors (see below), whose sum is σ = 153307920. Its totient is φ = 20441040.

The previous prime is 61323121. The next prime is 61323169. The reversal of 61323144 is 44132316.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2555131 = 61323144 / (6 + 1 + 3 + 2 + 3 + 1 + 4 + 4).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277542 + ... + 1277589.

It is an arithmetic number, because the mean of its divisors is an integer number (9581745).

Almost surely, 2^61323144 is an apocalyptic number.

It is an amenable number.

61323144 is an abundant number, since it is smaller than the sum of its proper divisors (91984776).

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

61323144 is a wasteful number, since it uses less digits than its factorization.

61323144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555140 (or 2555136 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 61323144 is about 7830.9095257192. The cubic root of 61323144 is about 394.3436067362.

The spelling of 61323144 in words is "sixty-one million, three hundred twenty-three thousand, one hundred forty-four".