61500016516 has 6 divisors (see below), whose sum is σ = 107625028910. Its totient is φ = 30750008256.

The previous prime is 61500016511. The next prime is 61500016537. The reversal of 61500016516 is 61561000516.

It can be written as a sum of positive squares in only one way, i.e., 44649380416 + 16850636100 = 211304^2 + 129810^2 .

It is not an unprimeable number, because it can be changed into a prime (61500016511) 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 as a sum of consecutive naturals, namely, 7687502061 + ... + 7687502068.

Almost surely, 2^61500016516 is an apocalyptic number.

It is an amenable number.

61500016516 is a deficient number, since it is larger than the sum of its proper divisors (46125012394).

61500016516 is a wasteful number, since it uses less digits than its factorization.

61500016516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15375004133 (or 15375004131 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 61500016516 in words is "sixty-one billion, five hundred million, sixteen thousand, five hundred sixteen".