61599899516 has 6 divisors (see below), whose sum is σ = 107799824160. Its totient is φ = 30799949756.

The previous prime is 61599899503. The next prime is 61599899519.

61599899516 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 (61599899519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7699987436 + ... + 7699987443.

It is an arithmetic number, because the mean of its divisors is an integer number (17966637360).

Almost surely, 2^61599899516 is an apocalyptic number.

It is an amenable number.

61599899516 is a deficient number, since it is larger than the sum of its proper divisors (46199924644).

61599899516 is a wasteful number, since it uses less digits than its factorization.

61599899516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15399974883 (or 15399974881 counting only the distinct ones).

The product of its digits is 47239200, while the sum is 68.

The spelling of 61599899516 in words is "sixty-one billion, five hundred ninety-nine million, eight hundred ninety-nine thousand, five hundred sixteen".