61463144 has 8 divisors (see below), whose sum is σ = 115243410. Its totient is φ = 30731568.

The previous prime is 61463137. The next prime is 61463147. The reversal of 61463144 is 44136416.

It can be written as a sum of positive squares in only one way, i.e., 61434244 + 28900 = 7838^2 + 170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (61463147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841439 + ... + 3841454.

Almost surely, 2^61463144 is an apocalyptic number.

It is an amenable number.

61463144 is a deficient number, since it is larger than the sum of its proper divisors (53780266).

61463144 is a wasteful number, since it uses less digits than its factorization.

61463144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682899 (or 7682895 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 61463144 is about 7839.8433657823. The cubic root of 61463144 is about 394.6434725585.

The spelling of 61463144 in words is "sixty-one million, four hundred sixty-three thousand, one hundred forty-four".