145090142649 has 15 divisors (see below), whose sum is σ = 216744717013. Its totient is φ = 96724476324.

The previous prime is 145090142623. The next prime is 145090142653. The reversal of 145090142649 is 946241090541.

The square root of 145090142649 is 380907.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 145090142649 - 2³³ = 136500208057 is a prime.

It is a super-2 number, since 2×145090142649² (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 (145090142749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3407002 + ... + 3449324.

Almost surely, 2^145090142649 is an apocalyptic number.

145090142649 is the 380907-th square number.

145090142649 is the 190454-th centered octagonal number.

It is an amenable number.

145090142649 is a deficient number, since it is larger than the sum of its proper divisors (71654574364).

145090142649 is an frugal number, since it uses more digits than its factorization.

145090142649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84658 (or 42326 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 145090142649 in words is "one hundred forty-five billion, ninety million, one hundred forty-two thousand, six hundred forty-nine".