61687348516 has 12 divisors (see below), whose sum is σ = 110585856780. Its totient is φ = 30091389440.

The previous prime is 61687348487. The next prime is 61687348589. The reversal of 61687348516 is 61584378616.

It can be written as a sum of positive squares in 2 ways, for example, as 11759233600 + 49928114916 = 108440^2 + 223446^2 .

It is an unprimeable number.

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, 188071021 + ... + 188071348.

It is an arithmetic number, because the mean of its divisors is an integer number (9215488065).

Almost surely, 2^61687348516 is an apocalyptic number.

It is an amenable number.

61687348516 is a deficient number, since it is larger than the sum of its proper divisors (48898508264).

61687348516 is a wasteful number, since it uses less digits than its factorization.

61687348516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376142414 (or 376142412 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 61687348516 in words is "sixty-one billion, six hundred eighty-seven million, three hundred forty-eight thousand, five hundred sixteen".