61686840030361 has 16 divisors (see below), whose sum is σ = 75926097654400. Its totient is φ = 48804706061568.

The previous prime is 61686840030353. The next prime is 61686840030383. The reversal of 61686840030361 is 16303004868616.

It is a cyclic number.

It is not a de Polignac number, because 61686840030361 - 2³ = 61686840030353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61686840030299 and 61686840030308.

It is not an unprimeable number, because it can be changed into a prime (61686840030301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15298176 + ... + 18905233.

It is an arithmetic number, because the mean of its divisors is an integer number (4745381103400).

Almost surely, 2^{61686840030361} is an apocalyptic number.

It is an amenable number.

61686840030361 is a deficient number, since it is larger than the sum of its proper divisors (14239257624039).

61686840030361 is a wasteful number, since it uses less digits than its factorization.

61686840030361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34223248.

The product of its (nonzero) digits is 2985984, while the sum is 52.

Adding to 61686840030361 its reverse (16303004868616), we get a palindrome (77989844898977).

The spelling of 61686840030361 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred forty million, thirty thousand, three hundred sixty-one".