42855929091 has 8 divisors (see below), whose sum is σ = 63490265360. Its totient is φ = 28570619376.

The previous prime is 42855929071. The next prime is 42855929093. The reversal of 42855929091 is 19092955824.

42855929091 is a `hidden beast` number, since 42 + 8 + 5 + 592 + 9 + 0 + 9 + 1 = 666.

42855929091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42855929091 - 2⁶ = 42855929027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42855929093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793628290 + ... + 793628343.

It is an arithmetic number, because the mean of its divisors is an integer number (7936283170).

Almost surely, 2^42855929091 is an apocalyptic number.

42855929091 is a deficient number, since it is larger than the sum of its proper divisors (20634336269).

42855929091 is a wasteful number, since it uses less digits than its factorization.

42855929091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587256642 (or 1587256636 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 42855929091 in words is "forty-two billion, eight hundred fifty-five million, nine hundred twenty-nine thousand, ninety-one".