61335813278885 has 8 divisors (see below), whose sum is σ = 77932562754456. Its totient is φ = 46182259409920.

The previous prime is 61335813278879. The next prime is 61335813278893. The reversal of 61335813278885 is 58887231853316.

It can be written as a sum of positive squares in 4 ways, for example, as 14807234832289 + 46528578446596 = 3848017^2 + 6821186^2 .

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

It is not a de Polignac number, because 61335813278885 - 2⁶ = 61335813278821 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 360798901556 + ... + 360798901725.

It is an arithmetic number, because the mean of its divisors is an integer number (9741570344307).

Almost surely, 2^{61335813278885} is an apocalyptic number.

It is an amenable number.

61335813278885 is a deficient number, since it is larger than the sum of its proper divisors (16596749475571).

61335813278885 is a wasteful number, since it uses less digits than its factorization.

61335813278885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721597803303.

The product of its digits is 232243200, while the sum is 68.

The spelling of 61335813278885 in words is "sixty-one trillion, three hundred thirty-five billion, eight hundred thirteen million, two hundred seventy-eight thousand, eight hundred eighty-five".