73771648 has 16 divisors (see below), whose sum is σ = 146967210. Its totient is φ = 36885760.

The previous prime is 73771597. The next prime is 73771667. The reversal of 73771648 is 84617737.

It can be written as a sum of positive squares in only one way, i.e., 50808384 + 22963264 = 7128^2 + 4792^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288043 + ... + 288298.

Almost surely, 2^73771648 is an apocalyptic number.

It is an amenable number.

73771648 is a deficient number, since it is larger than the sum of its proper divisors (73195562).

73771648 is an equidigital number, since it uses as much as digits as its factorization.

73771648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576355 (or 576343 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The square root of 73771648 is about 8589.0423214698. The cubic root of 73771648 is about 419.4013542325.

It can be divided in two parts, 7377 and 1648, that added together give a square (9025 = 95²).

The spelling of 73771648 in words is "seventy-three million, seven hundred seventy-one thousand, six hundred forty-eight".