61900144 has 20 divisors (see below), whose sum is σ = 120540400. Its totient is φ = 30792960.

The previous prime is 61900133. The next prime is 61900151. The reversal of 61900144 is 44100916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6537 + ... + 12904.

It is an arithmetic number, because the mean of its divisors is an integer number (6027020).

Almost surely, 2^61900144 is an apocalyptic number.

It is an amenable number.

61900144 is a deficient number, since it is larger than the sum of its proper divisors (58640256).

61900144 is a wasteful number, since it uses less digits than its factorization.

61900144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19648 (or 19642 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61900144 is about 7867.6644564953. The cubic root of 61900144 is about 395.5765633379.

The spelling of 61900144 in words is "sixty-one million, nine hundred thousand, one hundred forty-four".