61540412 has 12 divisors (see below), whose sum is σ = 107751000. Its totient is φ = 30754416.

The previous prime is 61540403. The next prime is 61540417. The reversal of 61540412 is 21404516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61540417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11798 + ... + 16194.

It is an arithmetic number, because the mean of its divisors is an integer number (8979250).

Almost surely, 2^61540412 is an apocalyptic number.

It is an amenable number.

61540412 is a deficient number, since it is larger than the sum of its proper divisors (46210588).

61540412 is a wasteful number, since it uses less digits than its factorization.

61540412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7900 (or 7898 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 61540412 is about 7844.7697225604. The cubic root of 61540412 is about 394.8087778163.

Adding to 61540412 its reverse (21404516), we get a palindrome (82944928).

The spelling of 61540412 in words is "sixty-one million, five hundred forty thousand, four hundred twelve".