61645448 has 16 divisors (see below), whose sum is σ = 116352960. Its totient is φ = 30618000.

The previous prime is 61645433. The next prime is 61645469. The reversal of 61645448 is 84454616.

It is a super-2 number, since 2×61645448² = 7600322518241408, which contains 22 as substring.

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, 24308 + ... + 26723.

It is an arithmetic number, because the mean of its divisors is an integer number (7272060).

Almost surely, 2^61645448 is an apocalyptic number.

It is an amenable number.

61645448 is a deficient number, since it is larger than the sum of its proper divisors (54707512).

61645448 is a wasteful number, since it uses less digits than its factorization.

61645448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51188 (or 51184 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 61645448 is about 7851.4615199974. The cubic root of 61645448 is about 395.0332675073.

It can be divided in two parts, 616 and 45448, that added together give a palindrome (46064).

The spelling of 61645448 in words is "sixty-one million, six hundred forty-five thousand, four hundred forty-eight".