61417257477747 has 16 divisors (see below), whose sum is σ = 83635465144320. Its totient is φ = 40072016043392.

The previous prime is 61417257477713. The next prime is 61417257477767. The reversal of 61417257477747 is 74777475271416.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61417257477747 - 2³⁸ = 61142379570803 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61417257477767) 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, 5567478 + ... + 12402875.

It is an arithmetic number, because the mean of its divisors is an integer number (5227216571520).

Almost surely, 2^{61417257477747} is an apocalyptic number.

61417257477747 is a deficient number, since it is larger than the sum of its proper divisors (22218207666573).

61417257477747 is a wasteful number, since it uses less digits than its factorization.

61417257477747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17994642.

The product of its digits is 451772160, while the sum is 69.

The spelling of 61417257477747 in words is "sixty-one trillion, four hundred seventeen billion, two hundred fifty-seven million, four hundred seventy-seven thousand, seven hundred forty-seven".