42639290811 has 16 divisors (see below), whose sum is σ = 68028498720. Its totient is φ = 26239563360.

The previous prime is 42639290789. The next prime is 42639290833. The reversal of 42639290811 is 11809293624.

42639290811 is a `hidden beast` number, since 4 + 2 + 639 + 2 + 9 + 0 + 8 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (42639290789) and next prime (42639290833).

It is not a de Polignac number, because 42639290811 - 2¹¹ = 42639288763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42639290851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60739380 + ... + 60740081.

It is an arithmetic number, because the mean of its divisors is an integer number (4251781170).

Almost surely, 2^42639290811 is an apocalyptic number.

42639290811 is a deficient number, since it is larger than the sum of its proper divisors (25389207909).

42639290811 is a wasteful number, since it uses less digits than its factorization.

42639290811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121479483 (or 121479477 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 42639290811 in words is "forty-two billion, six hundred thirty-nine million, two hundred ninety thousand, eight hundred eleven".