145420215551161 has 8 divisors (see below), whose sum is σ = 145443837095424. Its totient is φ = 145396594817280.

The previous prime is 145420215551089. The next prime is 145420215551183. The reversal of 145420215551161 is 161155512024541.

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

It is a cyclic number.

It is not a de Polignac number, because 145420215551161 - 2²⁷ = 145420081333433 is a prime.

It is a super-2 number, since 2×145420215551161² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145420215551461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432343096 + ... + 432679318.

It is an arithmetic number, because the mean of its divisors is an integer number (18180479636928).

Almost surely, 2^{145420215551161} is an apocalyptic number.

It is an amenable number.

145420215551161 is a deficient number, since it is larger than the sum of its proper divisors (23621544263).

145420215551161 is an equidigital number, since it uses as much as digits as its factorization.

145420215551161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405191.

The product of its (nonzero) digits is 240000, while the sum is 43.

The spelling of 145420215551161 in words is "one hundred forty-five trillion, four hundred twenty billion, two hundred fifteen million, five hundred fifty-one thousand, one hundred sixty-one".