61897466479817 has 16 divisors (see below), whose sum is σ = 63552248255232. Its totient is φ = 60256924197120.

The previous prime is 61897466479811. The next prime is 61897466479819. The reversal of 61897466479817 is 71897466479816.

It is not a de Polignac number, because 61897466479817 - 2³² = 61893171512521 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 33934358 + ... + 35711840.

It is an arithmetic number, because the mean of its divisors is an integer number (3972015515952).

Almost surely, 2^{61897466479817} is an apocalyptic number.

It is an amenable number.

61897466479817 is a deficient number, since it is larger than the sum of its proper divisors (1654781775415).

61897466479817 is a wasteful number, since it uses less digits than its factorization.

61897466479817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781488.

The product of its digits is 6145155072, while the sum is 83.

Subtracting 61897466479817 from its reverse (71897466479816), we obtain a palindrome (9999999999999).

The spelling of 61897466479817 in words is "sixty-one trillion, eight hundred ninety-seven billion, four hundred sixty-six million, four hundred seventy-nine thousand, eight hundred seventeen".