1138874245549 has 2 divisors, whose sum is σ = 1138874245550. Its totient is φ = 1138874245548.

The previous prime is 1138874245541. The next prime is 1138874245567. The reversal of 1138874245549 is 9455424788311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1098062973225 + 40811272324 = 1047885^2 + 202018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138874245549 - 2³ = 1138874245541 is a prime.

It is a super-2 number, since 2×1138874245549² (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 (1138874245541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569437122774 + 569437122775.

It is an arithmetic number, because the mean of its divisors is an integer number (569437122775).

Almost surely, 2^{1138874245549} is an apocalyptic number.

It is an amenable number.

1138874245549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138874245549 is an equidigital number, since it uses as much as digits as its factorization.

1138874245549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38707200, while the sum is 61.

The spelling of 1138874245549 in words is "one trillion, one hundred thirty-eight billion, eight hundred seventy-four million, two hundred forty-five thousand, five hundred forty-nine".