61243425618 has 16 divisors (see below), whose sum is σ = 122995098336. Its totient is φ = 20329767360.

The previous prime is 61243425577. The next prime is 61243425647. The reversal of 61243425618 is 81652434216.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61243425618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21175396 + ... + 21178287.

It is an arithmetic number, because the mean of its divisors is an integer number (7687193646).

Almost surely, 2^61243425618 is an apocalyptic number.

61243425618 is an abundant number, since it is smaller than the sum of its proper divisors (61751672718).

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

61243425618 is a wasteful number, since it uses less digits than its factorization.

61243425618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42353929.

The product of its digits is 276480, while the sum is 42.

The spelling of 61243425618 in words is "sixty-one billion, two hundred forty-three million, four hundred twenty-five thousand, six hundred eighteen".