145400040505 has 4 divisors (see below), whose sum is σ = 174480048612. Its totient is φ = 116320032400.

The previous prime is 145400040431. The next prime is 145400040589. The reversal of 145400040505 is 505040004541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505040004541 = 23 ⋅21958261067.

It can be written as a sum of positive squares in 2 ways, for example, as 74829055401 + 70570985104 = 273549^2 + 265652^2 .

It is not a de Polignac number, because 145400040505 - 2²⁷ = 145265822777 is a prime.

It is a super-2 number, since 2×145400040505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14540004046 + ... + 14540004055.

It is an arithmetic number, because the mean of its divisors is an integer number (43620012153).

Almost surely, 2^145400040505 is an apocalyptic number.

It is an amenable number.

145400040505 is a deficient number, since it is larger than the sum of its proper divisors (29080008107).

145400040505 is an equidigital number, since it uses as much as digits as its factorization.

145400040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29080008106.

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 145400040505 in words is "one hundred forty-five billion, four hundred million, forty thousand, five hundred five".