61566005535 has 32 divisors (see below), whose sum is σ = 100534659840. Its totient is φ = 32164332288.

The previous prime is 61566005513. The next prime is 61566005593. The reversal of 61566005535 is 53550066516.

It is not a de Polignac number, because 61566005535 - 2⁷ = 61566005407 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8779 + ... + 351011.

It is an arithmetic number, because the mean of its divisors is an integer number (3141708120).

Almost surely, 2^61566005535 is an apocalyptic number.

61566005535 is a deficient number, since it is larger than the sum of its proper divisors (38968654305).

61566005535 is a wasteful number, since it uses less digits than its factorization.

61566005535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342487.

The product of its (nonzero) digits is 405000, while the sum is 42.

The spelling of 61566005535 in words is "sixty-one billion, five hundred sixty-six million, five thousand, five hundred thirty-five".