642046445505 has 12 divisors (see below), whose sum is σ = 1112880505620. Its totient is φ = 342424770912.

The previous prime is 642046445501. The next prime is 642046445519. The reversal of 642046445505 is 505544640246.

642046445505 is a `hidden beast` number, since 6 + 42 + 0 + 4 + 64 + 45 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 434416764609 + 207629680896 = 659103^2 + 455664^2 .

It is not a de Polignac number, because 642046445505 - 2² = 642046445501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14267698789 = 642046445505 / (6 + 4 + 2 + 0 + 4 + 6 + 4 + 4 + 5 + 5 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (642046445501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7133849350 + ... + 7133849439.

It is an arithmetic number, because the mean of its divisors is an integer number (92740042135).

Almost surely, 2^642046445505 is an apocalyptic number.

It is an amenable number.

642046445505 is a deficient number, since it is larger than the sum of its proper divisors (470834060115).

642046445505 is a wasteful number, since it uses less digits than its factorization.

642046445505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14267698800 (or 14267698797 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

The spelling of 642046445505 in words is "six hundred forty-two billion, forty-six million, four hundred forty-five thousand, five hundred five".