61513231516 has 12 divisors (see below), whose sum is σ = 117434351160. Its totient is φ = 27960559760.

The previous prime is 61513231513. The next prime is 61513231517.

61513231516 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513231513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699013951 + ... + 699014038.

It is an arithmetic number, because the mean of its divisors is an integer number (9786195930).

Almost surely, 2^61513231516 is an apocalyptic number.

It is an amenable number.

61513231516 is a deficient number, since it is larger than the sum of its proper divisors (55921119644).

61513231516 is a wasteful number, since it uses less digits than its factorization.

61513231516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398028004 (or 1398028002 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The spelling of 61513231516 in words is "sixty-one billion, five hundred thirteen million, two hundred thirty-one thousand, five hundred sixteen".