149143130681 has 2 divisors, whose sum is σ = 149143130682. Its totient is φ = 149143130680.

The previous prime is 149143130677. The next prime is 149143130699. The reversal of 149143130681 is 186031341941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142596864400 + 6546266281 = 377620^2 + 80909^2 .

It is a cyclic number.

It is not a de Polignac number, because 149143130681 - 2² = 149143130677 is a prime.

It is a super-2 number, since 2×149143130681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149143130611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74571565340 + 74571565341.

It is an arithmetic number, because the mean of its divisors is an integer number (74571565341).

Almost surely, 2^149143130681 is an apocalyptic number.

It is an amenable number.

149143130681 is a deficient number, since it is larger than the sum of its proper divisors (1).

149143130681 is an equidigital number, since it uses as much as digits as its factorization.

149143130681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 149143130681 in words is "one hundred forty-nine billion, one hundred forty-three million, one hundred thirty thousand, six hundred eighty-one".