61897466479816 has 16 divisors (see below), whose sum is σ = 126608454163440. Its totient is φ = 28135212036240.

The previous prime is 61897466479811. The next prime is 61897466479819.

It is a happy number.

61897466479816 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 61897466479816.

It is not an unprimeable number, because it can be changed into a prime (61897466479811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351690150366 + ... + 351690150541.

It is an arithmetic number, because the mean of its divisors is an integer number (7913028385215).

Almost surely, 2^{61897466479816} is an apocalyptic number.

It is an amenable number.

61897466479816 is an abundant number, since it is smaller than the sum of its proper divisors (64710987683624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61897466479816 is a wasteful number, since it uses less digits than its factorization.

61897466479816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703380300924 (or 703380300920 counting only the distinct ones).

The product of its digits is 5267275776, while the sum is 82.

The spelling of 61897466479816 in words is "sixty-one trillion, eight hundred ninety-seven billion, four hundred sixty-six million, four hundred seventy-nine thousand, eight hundred sixteen".