61791744 has 120 divisors (see below), whose sum is σ = 191726568. Its totient is φ = 17633280.

The previous prime is 61791733. The next prime is 61791749. The reversal of 61791744 is 44719716.

61791744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61791749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74854 + ... + 75674.

Almost surely, 2^61791744 is an apocalyptic number.

61791744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61791744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95863284).

61791744 is an abundant number, since it is smaller than the sum of its proper divisors (129934824).

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

61791744 is an equidigital number, since it uses as much as digits as its factorization.

61791744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 833 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 61791744 is about 7860.7724811242. The cubic root of 61791744 is about 395.3455161924.

The spelling of 61791744 in words is "sixty-one million, seven hundred ninety-one thousand, seven hundred forty-four".