145499525137 has 8 divisors (see below), whose sum is σ = 147964343912. Its totient is φ = 143037273600.

The previous prime is 145499525113. The next prime is 145499525159. The reversal of 145499525137 is 731525994541.

It is a Cunningham number, because it is equal to 381444²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 156350016 + 145343175121 = 12504^2 + 381239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145499525137 is a prime.

It is a super-2 number, since 2×145499525137² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145499528137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527328 + ... + 754369.

It is an arithmetic number, because the mean of its divisors is an integer number (18495542989).

Almost surely, 2^145499525137 is an apocalyptic number.

It is an amenable number.

145499525137 is a deficient number, since it is larger than the sum of its proper divisors (2464818775).

145499525137 is a wasteful number, since it uses less digits than its factorization.

145499525137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283619.

The product of its digits is 6804000, while the sum is 55.

The spelling of 145499525137 in words is "one hundred forty-five billion, four hundred ninety-nine million, five hundred twenty-five thousand, one hundred thirty-seven".