61571605835 has 16 divisors (see below), whose sum is σ = 76152953952. Its totient is φ = 47755411200.

The previous prime is 61571605793. The next prime is 61571605841. The reversal of 61571605835 is 53850617516.

It is not a de Polignac number, because 61571605835 - 2²⁰ = 61570557259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61571605835.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540221 + ... + 644190.

It is an arithmetic number, because the mean of its divisors is an integer number (4759559622).

Almost surely, 2^61571605835 is an apocalyptic number.

61571605835 is a deficient number, since it is larger than the sum of its proper divisors (14581348117).

61571605835 is a wasteful number, since it uses less digits than its factorization.

61571605835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184734.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 61571605835 in words is "sixty-one billion, five hundred seventy-one million, six hundred five thousand, eight hundred thirty-five".