137449892081 has 2 divisors, whose sum is σ = 137449892082. Its totient is φ = 137449892080.

The previous prime is 137449891993. The next prime is 137449892087. The reversal of 137449892081 is 180298944731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120173155600 + 17276736481 = 346660^2 + 131441^2 .

It is a cyclic number.

It is not a de Polignac number, because 137449892081 - 2¹⁸ = 137449629937 is a prime.

It is a super-2 number, since 2×137449892081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137449892087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68724946040 + 68724946041.

It is an arithmetic number, because the mean of its divisors is an integer number (68724946041).

Almost surely, 2^137449892081 is an apocalyptic number.

It is an amenable number.

137449892081 is a deficient number, since it is larger than the sum of its proper divisors (1).

137449892081 is an equidigital number, since it uses as much as digits as its factorization.

137449892081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 137449892081 in words is "one hundred thirty-seven billion, four hundred forty-nine million, eight hundred ninety-two thousand, eighty-one".