37798661869 has 2 divisors, whose sum is σ = 37798661870. Its totient is φ = 37798661868.

The previous prime is 37798661867. The next prime is 37798661939. The reversal of 37798661869 is 96816689773.

It is an a-pointer prime, because the next prime (37798661939) can be obtained adding 37798661869 to its sum of digits (70).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29502184644 + 8296477225 = 171762^2 + 91085^2 .

It is an emirp because it is prime and its reverse (96816689773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37798661869 - 2¹ = 37798661867 is a prime.

It is a super-2 number, since 2×37798661869² (a number of 22 digits) contains 22 as substring.

Together with 37798661867, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 37798661798 and 37798661807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37798661867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18899330934 + 18899330935.

It is an arithmetic number, because the mean of its divisors is an integer number (18899330935).

Almost surely, 2^37798661869 is an apocalyptic number.

It is an amenable number.

37798661869 is a deficient number, since it is larger than the sum of its proper divisors (1).

37798661869 is an equidigital number, since it uses as much as digits as its factorization.

37798661869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164602368, while the sum is 70.

The spelling of 37798661869 in words is "thirty-seven billion, seven hundred ninety-eight million, six hundred sixty-one thousand, eight hundred sixty-nine".