61540604 has 6 divisors (see below), whose sum is σ = 107696064. Its totient is φ = 30770300.

The previous prime is 61540553. The next prime is 61540607. The reversal of 61540604 is 40604516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61540607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7692572 + ... + 7692579.

It is an arithmetic number, because the mean of its divisors is an integer number (17949344).

Almost surely, 2^61540604 is an apocalyptic number.

It is an amenable number.

61540604 is a deficient number, since it is larger than the sum of its proper divisors (46155460).

61540604 is a wasteful number, since it uses less digits than its factorization.

61540604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15385155 (or 15385153 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 61540604 is about 7844.7819600037. The cubic root of 61540604 is about 394.8091884040.

The spelling of 61540604 in words is "sixty-one million, five hundred forty thousand, six hundred four".