61243425617 has 16 divisors (see below), whose sum is σ = 68054679360. Its totient is φ = 54642542400.

The previous prime is 61243425577. The next prime is 61243425647. The reversal of 61243425617 is 71652434216.

It is a cyclic number.

It is not a de Polignac number, because 61243425617 - 2²⁶ = 61176316753 is a prime.

It is a super-4 number, since 4×61243425617⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61243425647) 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, 320867 + ... + 474807.

It is an arithmetic number, because the mean of its divisors is an integer number (4253417460).

Almost surely, 2^61243425617 is an apocalyptic number.

It is an amenable number.

61243425617 is a deficient number, since it is larger than the sum of its proper divisors (6811253743).

61243425617 is a wasteful number, since it uses less digits than its factorization.

61243425617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154624.

The product of its digits is 241920, while the sum is 41.

The spelling of 61243425617 in words is "sixty-one billion, two hundred forty-three million, four hundred twenty-five thousand, six hundred seventeen".