61365963019618 has 8 divisors (see below), whose sum is σ = 92381251189212. Its totient is φ = 30572212623216.

The previous prime is 61365963019609. The next prime is 61365963019643. The reversal of 61365963019618 is 81691036956316.

It can be written as a sum of positive squares in 2 ways, for example, as 61016985727569 + 348977292049 = 7811337^2 + 590743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61365963019618.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55384442605 + ... + 55384443712.

Almost surely, 2^{61365963019618} is an apocalyptic number.

61365963019618 is a deficient number, since it is larger than the sum of its proper divisors (31015288169594).

61365963019618 is a wasteful number, since it uses less digits than its factorization.

61365963019618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110768886596.

The product of its (nonzero) digits is 37791360, while the sum is 64.

The spelling of 61365963019618 in words is "sixty-one trillion, three hundred sixty-five billion, nine hundred sixty-three million, nineteen thousand, six hundred eighteen".