37781481011 has 2 divisors, whose sum is σ = 37781481012. Its totient is φ = 37781481010.

The previous prime is 37781480987. The next prime is 37781481029. The reversal of 37781481011 is 11018418773.

It is a strong prime.

It is an emirp because it is prime and its reverse (11018418773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37781481011 - 2¹⁰ = 37781479987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37781481011.

It is not a weakly prime, because it can be changed into another prime (37781481091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18890740505 + 18890740506.

It is an arithmetic number, because the mean of its divisors is an integer number (18890740506).

Almost surely, 2^37781481011 is an apocalyptic number.

37781481011 is a deficient number, since it is larger than the sum of its proper divisors (1).

37781481011 is an equidigital number, since it uses as much as digits as its factorization.

37781481011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 41.

Adding to 37781481011 its reverse (11018418773), we get a palindrome (48799899784).

The spelling of 37781481011 in words is "thirty-seven billion, seven hundred eighty-one million, four hundred eighty-one thousand, eleven".