42378336157 has 2 divisors, whose sum is σ = 42378336158. Its totient is φ = 42378336156.

The previous prime is 42378336113. The next prime is 42378336167. The reversal of 42378336157 is 75163387324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26677995556 + 15700340601 = 163334^2 + 125301^2 .

It is a cyclic number.

It is not a de Polignac number, because 42378336157 - 2¹¹ = 42378334109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42378336157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42378336167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21189168078 + 21189168079.

It is an arithmetic number, because the mean of its divisors is an integer number (21189168079).

Almost surely, 2^42378336157 is an apocalyptic number.

It is an amenable number.

42378336157 is a deficient number, since it is larger than the sum of its proper divisors (1).

42378336157 is an equidigital number, since it uses as much as digits as its factorization.

42378336157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 49.

The spelling of 42378336157 in words is "forty-two billion, three hundred seventy-eight million, three hundred thirty-six thousand, one hundred fifty-seven".