42905885651 has 4 divisors (see below), whose sum is σ = 43546272072. Its totient is φ = 42265499232.

The previous prime is 42905885641. The next prime is 42905885653. The reversal of 42905885651 is 15658850924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42905885651 - 2⁶ = 42905885587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42905885593 and 42905885602.

It is not an unprimeable number, because it can be changed into a prime (42905885653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320193110 + ... + 320193243.

It is an arithmetic number, because the mean of its divisors is an integer number (10886568018).

Almost surely, 2^42905885651 is an apocalyptic number.

42905885651 is a deficient number, since it is larger than the sum of its proper divisors (640386421).

42905885651 is an equidigital number, since it uses as much as digits as its factorization.

42905885651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640386420.

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 42905885651 in words is "forty-two billion, nine hundred five million, eight hundred eighty-five thousand, six hundred fifty-one".