61444816 has 10 divisors (see below), whose sum is σ = 119049362. Its totient is φ = 30722400.

The previous prime is 61444813. The next prime is 61444819. The reversal of 61444816 is 61844416.

It is an interprime number because it is at equal distance from previous prime (61444813) and next prime (61444819).

It can be written as a sum of positive squares in only one way, i.e., 53582400 + 7862416 = 7320^2 + 2804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61444813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920135 + ... + 1920166.

Almost surely, 2^61444816 is an apocalyptic number.

It is an amenable number.

61444816 is a deficient number, since it is larger than the sum of its proper divisors (57604546).

61444816 is a wasteful number, since it uses less digits than its factorization.

61444816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840309 (or 3840303 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 61444816 is about 7838.6743777248. The cubic root of 61444816 is about 394.6042417601.

The spelling of 61444816 in words is "sixty-one million, four hundred forty-four thousand, eight hundred sixteen".