42177707991 has 16 divisors (see below), whose sum is σ = 62830724320. Its totient is φ = 27963118080.

The previous prime is 42177707963. The next prime is 42177708019. The reversal of 42177707991 is 19970777124.

It is an interprime number because it is at equal distance from previous prime (42177707963) and next prime (42177708019).

It is not a de Polignac number, because 42177707991 - 2¹⁷ = 42177576919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42177707951) 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, 4310410 + ... + 4320183.

It is an arithmetic number, because the mean of its divisors is an integer number (3926920270).

Almost surely, 2^42177707991 is an apocalyptic number.

42177707991 is a deficient number, since it is larger than the sum of its proper divisors (20653016329).

42177707991 is a wasteful number, since it uses less digits than its factorization.

42177707991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8630783 (or 8630777 counting only the distinct ones).

The product of its (nonzero) digits is 1555848, while the sum is 54.

The spelling of 42177707991 in words is "forty-two billion, one hundred seventy-seven million, seven hundred seven thousand, nine hundred ninety-one".