61540360 has 32 divisors (see below), whose sum is σ = 158247360. Its totient is φ = 21099456.

The previous prime is 61540351. The next prime is 61540403. The reversal of 61540360 is 6304516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109614 + ... + 110173.

It is an arithmetic number, because the mean of its divisors is an integer number (4945230).

Almost surely, 2^61540360 is an apocalyptic number.

It is an amenable number.

61540360 is an abundant number, since it is smaller than the sum of its proper divisors (96707000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61540360 is a wasteful number, since it uses less digits than its factorization.

61540360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219805 (or 219801 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 61540360 is about 7844.7664082495. The cubic root of 61540360 is about 394.8086666153.

Adding to 61540360 its reverse (6304516), we get a palindrome (67844876).

The spelling of 61540360 in words is "sixty-one million, five hundred forty thousand, three hundred sixty".