61501144 has 16 divisors (see below), whose sum is σ = 115467120. Its totient is φ = 30709920.

The previous prime is 61501093. The next prime is 61501159. The reversal of 61501144 is 44110516.

It is a congruent number.

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, 1914 + ... + 11254.

It is an arithmetic number, because the mean of its divisors is an integer number (7216695).

Almost surely, 2^61501144 is an apocalyptic number.

It is an amenable number.

61501144 is a deficient number, since it is larger than the sum of its proper divisors (53965976).

61501144 is a wasteful number, since it uses less digits than its factorization.

61501144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170 (or 10166 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 61501144 is about 7842.2665091158. The cubic root of 61501144 is about 394.7247861257.

The spelling of 61501144 in words is "sixty-one million, five hundred one thousand, one hundred forty-four".