42208040781 has 12 divisors (see below), whose sum is σ = 61073950080. Its totient is φ = 28089410760.

The previous prime is 42208040773. The next prime is 42208040821. The reversal of 42208040781 is 18704080224.

42208040781 is a `hidden beast` number, since 42 + 208 + 0 + 407 + 8 + 1 = 666.

It is not a de Polignac number, because 42208040781 - 2³ = 42208040773 is a prime.

It is a super-2 number, since 2×42208040781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42208090781) 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, 4101501 + ... + 4111778.

It is an arithmetic number, because the mean of its divisors is an integer number (5089495840).

Almost surely, 2^42208040781 is an apocalyptic number.

It is an amenable number.

42208040781 is a deficient number, since it is larger than the sum of its proper divisors (18865909299).

42208040781 is a wasteful number, since it uses less digits than its factorization.

42208040781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213856 (or 8213853 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 42208040781 in words is "forty-two billion, two hundred eight million, forty thousand, seven hundred eighty-one".