145220261545 has 16 divisors (see below), whose sum is σ = 182642117760. Its totient is φ = 110635512064.

The previous prime is 145220261519. The next prime is 145220261573. The reversal of 145220261545 is 545162022541.

It is a cyclic number.

It is not a de Polignac number, because 145220261545 - 2⁵ = 145220261513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2755360 + ... + 2807569.

It is an arithmetic number, because the mean of its divisors is an integer number (11415132360).

Almost surely, 2^145220261545 is an apocalyptic number.

It is an amenable number.

145220261545 is a deficient number, since it is larger than the sum of its proper divisors (37421856215).

145220261545 is a wasteful number, since it uses less digits than its factorization.

145220261545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563184.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 145220261545 in words is "one hundred forty-five billion, two hundred twenty million, two hundred sixty-one thousand, five hundred forty-five".