42165554655 has 32 divisors (see below), whose sum is σ = 80455025664. Its totient is φ = 18437607936.

The previous prime is 42165554579. The next prime is 42165554723. The reversal of 42165554655 is 55645556124.

It is not a de Polignac number, because 42165554655 - 2¹³ = 42165546463 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, 8727514 + ... + 8732343.

It is an arithmetic number, because the mean of its divisors is an integer number (2514219552).

Almost surely, 2^42165554655 is an apocalyptic number.

42165554655 is a deficient number, since it is larger than the sum of its proper divisors (38289471009).

42165554655 is a wasteful number, since it uses less digits than its factorization.

42165554655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17459895.

The product of its digits is 3600000, while the sum is 48.

The spelling of 42165554655 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-four thousand, six hundred fifty-five".