1006561500655 has 16 divisors (see below), whose sum is σ = 1216690423200. Its totient is φ = 799372661760.

The previous prime is 1006561500649. The next prime is 1006561500667. The reversal of 1006561500655 is 5560051656001.

It is not a de Polignac number, because 1006561500655 - 2³ = 1006561500647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7080475 + ... + 7221235.

It is an arithmetic number, because the mean of its divisors is an integer number (76043151450).

Almost surely, 2^{1006561500655} is an apocalyptic number.

1006561500655 is a deficient number, since it is larger than the sum of its proper divisors (210128922545).

1006561500655 is a wasteful number, since it uses less digits than its factorization.

1006561500655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151194.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 1006561500655 in words is "one trillion, six billion, five hundred sixty-one million, five hundred thousand, six hundred fifty-five".