145126421665 has 32 divisors (see below), whose sum is σ = 177754881024. Its totient is φ = 113720376000.

The previous prime is 145126421659. The next prime is 145126421731. The reversal of 145126421665 is 566124621541.

It is not a de Polignac number, because 145126421665 - 2⁵ = 145126421633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 69537252 + ... + 69539338.

It is an arithmetic number, because the mean of its divisors is an integer number (5554840032).

Almost surely, 2^145126421665 is an apocalyptic number.

It is an amenable number.

145126421665 is a deficient number, since it is larger than the sum of its proper divisors (32628459359).

145126421665 is a wasteful number, since it uses less digits than its factorization.

145126421665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237.

The product of its digits is 345600, while the sum is 43.

The spelling of 145126421665 in words is "one hundred forty-five billion, one hundred twenty-six million, four hundred twenty-one thousand, six hundred sixty-five".