61040648 has 8 divisors (see below), whose sum is σ = 114451230. Its totient is φ = 30520320.

The previous prime is 61040627. The next prime is 61040653. The reversal of 61040648 is 84604016.

It can be written as a sum of positive squares in only one way, i.e., 51811204 + 9229444 = 7198^2 + 3038^2 .

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

It is a super-3 number, since 3×61040648³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61040648.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3815033 + ... + 3815048.

Almost surely, 2^61040648 is an apocalyptic number.

It is an amenable number.

61040648 is a deficient number, since it is larger than the sum of its proper divisors (53410582).

61040648 is a wasteful number, since it uses less digits than its factorization.

61040648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630087 (or 7630083 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 61040648 is about 7812.8514640943. The cubic root of 61040648 is about 393.7371364572.

The spelling of 61040648 in words is "sixty-one million, forty thousand, six hundred forty-eight".