1869373758149 has 2 divisors, whose sum is σ = 1869373758150. Its totient is φ = 1869373758148.

The previous prime is 1869373758143. The next prime is 1869373758157. The reversal of 1869373758149 is 9418573739681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1631449307524 + 237924450625 = 1277282^2 + 487775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1869373758149 is a prime.

It is a super-2 number, since 2×1869373758149² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1869373758143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934686879074 + 934686879075.

It is an arithmetic number, because the mean of its divisors is an integer number (934686879075).

Almost surely, 2^{1869373758149} is an apocalyptic number.

It is an amenable number.

1869373758149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1869373758149 is an equidigital number, since it uses as much as digits as its factorization.

1869373758149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274337280, while the sum is 71.

The spelling of 1869373758149 in words is "one trillion, eight hundred sixty-nine billion, three hundred seventy-three million, seven hundred fifty-eight thousand, one hundred forty-nine".