61511152303 has 4 divisors (see below), whose sum is σ = 61902943240. Its totient is φ = 61119361368.

The previous prime is 61511152291. The next prime is 61511152331. The reversal of 61511152303 is 30325111516.

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 61511152303 - 2¹³ = 61511144111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61511152363) 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, 195895233 + ... + 195895546.

It is an arithmetic number, because the mean of its divisors is an integer number (15475735810).

Almost surely, 2^61511152303 is an apocalyptic number.

61511152303 is a deficient number, since it is larger than the sum of its proper divisors (391790937).

61511152303 is a wasteful number, since it uses less digits than its factorization.

61511152303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391790936.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 61511152303 its reverse (30325111516), we get a palindrome (91836263819).

The spelling of 61511152303 in words is "sixty-one billion, five hundred eleven million, one hundred fifty-two thousand, three hundred three".