61545403 has 4 divisors (see below), whose sum is σ = 61580848. Its totient is φ = 61509960.

The previous prime is 61545371. The next prime is 61545409. The reversal of 61545403 is 30454516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61545403 - 2⁵ = 61545371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61545409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14976 + ... + 18637.

It is an arithmetic number, because the mean of its divisors is an integer number (15395212).

Almost surely, 2^61545403 is an apocalyptic number.

61545403 is a deficient number, since it is larger than the sum of its proper divisors (35445).

61545403 is a wasteful number, since it uses less digits than its factorization.

61545403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35444.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 61545403 is about 7845.0878261496. The cubic root of 61545403 is about 394.8194506803.

Adding to 61545403 its reverse (30454516), we get a palindrome (91999919).

The spelling of 61545403 in words is "sixty-one million, five hundred forty-five thousand, four hundred three".